Patton electronic Network Card 2701RC User Manual

USER  
MANUAL  
MODEL 2701RC Series  
NetLink-E1™  
E1/Fractional E1 CSU/DSU  
Rack Card  
Part# 07M2701RC-B  
Doc# 086131UB  
Revised 03/09/01  
SALES OFFICE  
(301) 975-1000  
TECHNICAL SUPPORT  
(301) 975-1007  
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E
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I
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An ISO-9001  
Certified Company  
 
cause harmful interference to radio or television reception, which can  
be determined by turning the equipment off and on, the user is  
encouraged to try to correct the interference by one or more of the fol-  
lowing measures:  
2.0 GENERAL INFORMATION  
Thank you for your purchase of this Patton Electronics product.  
This product has been thoroughly inspected and tested and is warrant-  
ed for One Year parts and labor. If any questions arise during installa-  
tion or use of the unit, contact Patton Electronics Technical Services at  
(301) 975-1007.  
Reorient or relocate the receiving antenna  
Increase the separation between the equipment and receiver  
2.1 FEATURES  
Connect the equipment into an outlet on a circuit different from that  
to which the receiver is connected  
Terminates E1/FE1 Circuits over a 4-Wire RJ-48C interface  
• Connects to standard CPE Serial Interfaces  
• Common Framed nx64 rates up to1984 kbps(G.704)  
• Unstructured Rate of 2.048 Mbps(G.703)  
• G.703 or G.704 Framing (with or without CRC-4, CAS multi-  
frame)  
1.3 CE NOTICE  
The CE symbol on your Patton Electronics equipment indicates  
that it is in compliance with the Electromagnetic Compatibility (EMC)  
directive of the European Union (EU). A Certificate of Compliance is  
available by contacting Patton Electronics Technical Support.  
• Selectable AMI or HDB3 Line Coding  
• Configuration via Internal DIP Switches, software control port, or  
SNMP management of local unit through the 1001MC  
• Six Easy-to-Read LED Indicators Monitor Data & Diagnostics  
• Internal, external, Network Clocking  
1.4 SERVICE INFORMATION  
• Also Operates as a High-Speed Point-to-Point Modem  
• Fits into Patton’s 2U Rack-Mount Chassis  
• Made in USA  
• Conforms to ONP requirements CTR12 and CTR13 for connec-  
tion to international telecom networks  
All warranty and non-warranty repairs must be returned freight  
prepaid and insured to Patton Electronics. All returns must have a  
Return Materials Authorization number on the outside of the shipping  
container. This number may be obtained from Patton Electronics  
Technical Support at:  
2.2 GENERAL PRODUCT DESCRIPTION  
tel: (301) 975-1007  
The Model 2701RC Series are single port E1/FE1 CSU/DSUs that  
provide high-speed WAN connectivity in a rack card package.  
Connecting to the serial WAN port of a switch, router or multiplexer, the  
NetLink-E1™ provides E1 or FE1 access connection at data rates of  
2.048 Mbps and nx64. The Netlink-E1™ is an excellent choice when  
terminating leased line services, Frame Relay backbones, internet  
access as well as LAN-to-LAN services.  
The Netlink-E1™ provides digital access to local WAN services  
between two facilities over a dedicated 4-Wire circuit. WAN band-  
width, framing and coding options are programmed via internally  
accessible DIP switches, via a VT-100 type terminal using a Model  
1001CC control card, or SNMP managable through the 1001MC. With  
a 1001CC card, a terminal can manage addressable 2701RC cards  
using menu driven controls. The Netlink-E1™ uses AMI and HDB3 line  
coding. Netlink-E1™ also supports a full range of system and diagnos-  
tic features that make system setup easy.  
NOTE: Packages received without an RMA number will not be  
accepted.  
Patton Electronics’ technical staff is also available to answer any  
questions that might arise concerning the installation or use of your  
Patton Model 2701RC. Technical Services hours: 8AM to 5PM EST,  
Monday through Friday.  
The NetLink-E1™ provides E1 terminations over a modular RJ-48C  
jack or dual 75 Ohm BNC connectors when using the 1001RCM11575.  
Power options include a single AC or DC or redundant AC/DC.  
3
4
 
3.0 CONFIGURATION  
NOTE: If you do not have a terminal, you may force the unit to use the  
DIP switches as the default configuration source by turning off the unit,  
setting all the DIP switches to the ON position, then powering on the  
unit. This will cause the unit to enter a special mode. Then turn off the  
unit and change the switch settings to the desired settings. When you  
turn the unit on again, the unit will be set up with the selected switch  
settings.  
The 2701RC features configuration capability via hardware DIP  
switches, a software control port, or SNMP through the 1001MC. This  
section describes all possible hardware and software switch configura-  
tions of the network connection.  
NOTE: The 2701RC factory default is set to DIP switch control.  
Software control can be enabled either through the control port  
or SNMP management station. Performing a hardware reset sets  
the unit for dip switch control.  
NOTE: The Model 2701RC is set to HDB3 line coding at the  
factory: This setting can be changed to AMI via VT-100 menus  
(using the 1001CC card) or SNMP Management (using the  
1001MC card).  
3.1 DIP SWITCH CONFIGURATION  
The Model 2701RC has two eight bit DIP switches and two rotary  
DIP switches that allow configuration for a wide range of applications.  
The switches are accessed by removing the card from the chassis.  
Switch S1-1 through S1-8  
S3  
S4  
A detailed description of each switch (S1-1 through S1-8) setting fol-  
lows the summary table below.  
S1  
S2  
SWITCH SET 1 SUMMARY TABLE  
Position  
S1-1  
S1-2  
S1-3  
S1-4  
S1-5  
S1-6  
S1-7  
S1-8  
Function  
Addressing-100 s bit  
Clocking Mode  
Clocking Mode  
Data Rate  
Factory Default Selected Option  
OFF  
OFF  
ON  
Address 1-99  
Internal  
FRONT RS-530  
Internal  
OFF  
OFF  
OFF  
OFF  
OFF  
2.048  
Data Rate  
Mbps Clear  
Channel  
Data Rate  
Figure 1. Model 2701RC Series top view, showing location of DIP switches  
}
Data Rate  
Data Rate  
Figure 1 (below) shows the location of the DIP switches on the top of  
the printed circuit board.  
DIP Switches S1 and S2 can be configured as either On or  
Off . Figure 2 (below) shows the orientation of the DIP switches with  
respect to ON/OFF positions. Default position and descriptions for  
Switches S1 and S2 are provided on the next page.  
SWITCH S1-1 ADDRESSING BIT  
Use Switch S1-1 to select address range 100-120 when used in  
conjunction with S3 and S4.  
ON  
S1-1  
OFF  
ON  
Address  
Address Range 1-99  
Address range 100-120  
OFF  
Figure 2. Close up of DIP switches showing ON/OFF positions.  
6
5
 
S1-2 and S1-3 CLOCK MODES  
ON  
OFF OFF OFF  
ON OFF OFF  
OFF ON  
ON ON  
ON  
ON  
OFF  
ON  
ON  
ON  
ON  
ON  
ON  
ON  
ON  
OFF  
ON  
ON  
ON  
ON  
ON  
ON  
ON  
ON  
ON  
OFF  
1472kbps  
1536kbps  
1600kbps  
1664kbps  
1728kbps  
1792kbps  
1856kbps  
1920kbps  
Set switch S1-2 and S1-3 to determine the 2701RC’s transmitter  
timing.  
OFF  
OFF  
OFF OFF ON  
ON OFF ON  
OFF ON  
ON ON  
S1-2  
On  
Off  
S1-3  
On  
On  
Clock Mode  
Network (Recieved Recovered)  
Internal  
ON  
ON  
1984kbps  
Clear Channel 2048kbps  
OFF OFF OFF  
On  
Off  
Off  
Off  
External  
Network (Recieved Recovered)  
NOTE: When the data rate is set to 2.048Mb/s, the unit is forced  
into G.703 mode, and it transmits user data on all 32 time-lots.  
There is no framing information; therefore, the CRC4 MF (S2-2)  
switch is ignored. In all other rate settings, the unit employs G.704  
framing; TS0 is reserved for signaling.  
Network Clock Transmitter timing is derived using the received line  
signal (received recovered) from the network.  
Internal Clock Transmitter timing is derived from an internal clock  
source.  
External Clock Transmitter timing is derived from DTE terminal tim  
ing.  
SWITCH SET 2 SUMMARY TABLE  
Position  
S2-1  
S2-2  
S2-3  
S2-4  
S2-5  
S2-6  
S2-7  
S2-8  
Function  
Factory Default  
Selected Option  
Disabled  
Disabled  
V.54  
CAS MF  
OFF  
OFF  
OFF  
ON  
SWITCH S1-4 THROUGH S1-8: DTE DATA RATE  
CRC-4 multiframe  
RDL Type  
Use switches S1-4 through S1-8 to set the DTE data rate.  
RDL Response  
TM from DTE  
Front Panel Switch  
NMS/VT-100 Switch  
Line build out  
Enabled  
Enabled  
S1-4 S1-5 S1-6  
ON OFF OFF  
OFF ON  
ON ON  
OFF OFF ON  
ON OFF ON  
OFF ON  
ON ON  
OFF OFF OFF  
ON OFF OFF  
OFF ON  
ON ON  
OFF OFF ON  
ON OFF ON  
OFF ON  
ON ON  
OFF OFF OFF  
ON OFF OFF  
OFF ON  
ON ON  
OFF OFF ON  
ON OFF ON  
OFF ON ON  
S1-7 S1-8  
OFF OFF  
OFF OFF  
OFF OFF  
OFF OFF  
OFF OFF  
OFF OFF  
OFF OFF  
Speed  
64kbps  
ON  
OFF  
OFF  
128kbps  
192kbps  
256kbps  
320kbps  
384kbps  
448kbps  
512kbps  
576kbps  
640kbps  
704kbps  
768kbps  
832kbps  
896kbps  
960kbps  
1024kbps  
1088kbps  
1152kbps  
1216kbps  
1280kbps  
1344kbps  
1408kbps  
ON  
Enabled  
OFF  
ON  
VT-100  
120 Ohms  
ON  
ON  
SWITCH S2-1: CAS MULTIFRAME  
ON  
ON  
ON  
ON  
ON  
ON  
ON  
ON  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
OFF  
ON  
ON  
ON  
ON  
ON  
CAS multiframe uses Timeslot 16 (TS16) to send multiframe (MF)  
alignment data. In CAS MF, a MF is defined as 16 frames, where a  
frame consists of 32 64kb/s timeslots, numbered 0 to 31. TS16 of the  
first frame in the MF contains the CAS MF alignment word in the upper  
four bits. The alignment word is always 0000 (binary). The 2701RC  
does not perform any signaling in TS16 other than to insert the MF  
alignment word, in order to maintain MF alignment. When CAS MF dis-  
abled, the unit transmits user data in TS16; therefore, up to 31 chan-  
nels are available for user data. When it is enabled, TS16 is not avail-  
able to the user. In this case, the user can use up to 30 channels for  
data. CAS MF can be used with CRC-4 MF or by itself. When enabled,  
both units must employ CAS MF; if one unit is set for CAS MF, and the  
other is not, the one using CAS MF will detect a loss of sync.  
OFF  
OFF  
ON  
ON  
OFF  
OFF  
ON  
ON  
8
7
 
Off  
On  
Response to DTE Loopback Request Enabled  
Response to DTE Loopback Request Disabled  
SWITCH S2-2: CRC-4 MULTIFRAME  
In framed mode, S2-2 is used for CRC-4 MF. When CRC-4 is enabled,  
the unit monitors the incoming data stream for CRC-4 errors. It trans-  
mits CRC-4 error counts to the transmitting unit.. When using timeslot  
zero (TS0), excessive errors may cause loss of frame or loss of sync.  
If CRC-4 MF is used, both units must be set for set for CRC-4 MF.  
Otherwise, the one using CRC-4 MF will detect loss of sync.  
SWITCH S2-6 FRONT PANEL SWITCHES  
As the Front Panel Switches may be inadvertently toggled, or in the  
event that the end-user may not need to use the switches, the installer  
may disable the front panel switches. Set Switch S2-6 to determine  
whether the front-panel toggle switches are enabled or disabled.  
S2-2  
Off  
Option  
CRC-4 Disabled  
CRC-4 Enabled  
S2-6  
Option  
On  
Off  
Front Panel Switches Enabled  
Front Panel Switches Disabled  
On  
NOTE: When the data rate is set to 2.048Mb/s, then the unit is  
forced into G.703 mode, and it transmits user data on all 32 time-  
lots. There is no framing information; therefore, the CRC4 MF (S2-  
2) switch is ignored. In all other rate settings, the unit employs  
G.704 framing; TS0 is reserved for signaling.  
SWITCH S2-7 VT-100 OR NMS SELECTION  
Switch S2-7 selects the configuration mode that the G.703 Access  
Rack Card uses. When VT-100 is selected, configuration and status  
can be setup through a VT-100 terminal using a 1001CC. When NMS  
(network management station) is selected, configuration and status  
can be setup and maintained through SNMP using a 1001MC. Please  
refer to the 1001MC user manual when using this mode.  
SWITCH S2-3: REMOTE DIGITAL LOOPBACK TYPE  
The user can set this switch to select the type of remote loop that  
will be initiated by the Model 2701. If set to V.54, the Model 2701 will  
initiate a V.54 loop when Remote Loop is selected by the front panel  
switches. If set to CSU, the Model 2701 will initiate a CSU loop when  
Remote Loop is selected by the front panel switches.  
Note: Dip switch configuration can be used regardless of the setting of  
this switch. The dip switches are enabled through the VT-100 screens,  
NMS, or by performing a hardware reset.  
S2-7  
On  
Management Selection  
NMS control  
S2-3  
Off  
On  
RDL Type  
Initiate a V.54 RDL loop when selected  
Initiate a CSU loopback when selected  
Off  
VT-100 control  
SWITCH S2-8 IMPEDANCE  
SWITCH S2-4: RDL RESPONSE  
Switch S2-8 is used to select the line build out for the Model 2701RC.  
When using the 1001RCM11575 (dual BNC) rear card, set S2-8 to  
OFF. When using a 120 Ohm cable with RJ-45 connectors, set S2-8 to  
ON.  
V.54 and CSU Loopbacks are special in-band loopback facility that  
sends a pseudo-random pattern over the data stream. This is useful for  
campus applications when you need to put a remote unit in loopback.  
The unit responds to the V.54 loopback command, and the whole  
process takes only a few seconds to complete. When V.54 Loopback  
is disabled, the unit will not be able to send or respond to V.54 or CSU  
loopback commands. The duration of the loopback is limited by the  
loopback timeout setting.  
S2-8  
75 Ohm  
120 Ohm  
Setting  
OFF  
ON  
S2-4  
Option  
Off  
On  
RDL Response Disabled  
RDL Response Enabled  
SWITCH S2-5 TEST MODE REQUEST FROM DTE  
Use Switch S2-5 to allow Model 2701RC to enter loopback tests when  
the DTE raises the appropriate loop request pin.  
S1-8  
Setting  
9
10  
 
3.2 CONFIGURING THE REAR INTERFACE CARD  
Prior to installation, you will need to examine the rear card you  
have selected and make sure it is properly configured for your applica-  
tion. Each rear card is configured by setting straps located on the PC  
board. To configure the rear cards, you must set the configuration  
straps. Figure 4 below shows the orientation of these straps. Each  
strap can either be on pegs 1 and 2, or on pegs 2 and 3.  
The Model 2701RC Series has five interface card options: the  
Model 1001RCM12548C (DB-25/RJ-48C), the Model  
1001RCM13448C (M/34/RJ-48C), the Model 1001RCM11548C (DB-  
15/RJ-48C), the Model 1001RCM11575 (DB-15/Dual BNC). Each of  
these options supports one DTE interface connection and one 4-wire  
line connection. Figure 3 below illustrates the five different interface  
options for the Model 2701RC Series.  
Model  
1001RCM11575 1001RCM11548C  
Model  
Model  
1001RCM12548C  
Model  
1001RCM13448C  
Model  
IM2RC/IA  
RJ-48C  
RJ-48C  
Dual BNC  
RJ-48C  
RJ-48C  
Figure 4. Orientation of Interface Card Straps  
Sections 3.2.1, 3.2.2, and 3.2.3 describe the strap locations and possi-  
ble settings for each rear card.  
3.2.1 Model 1001RCM12548C Strap Settings  
Figure 5 shows strap locations for the Model 1001RCM12548C  
(DB-25) rear cards. These straps determine various grounding charac-  
teristics for the terminal interface and twisted pair lines. JB3 and JB4  
are user configurable.  
DB-15 F  
DB-15 F  
DB-25 F  
M/34 F  
Figure 3. Model 2701RC Series interface card options  
JB3  
1 2 3  
NOTE: The 2701RC Series rear cards are specifically designed  
to operate with the E1 function card and must not be swapped  
with other Patton function cards. In addition the rear card must  
match the flip card installed on the front card.  
JB4  
1 2 3  
Figure 5. 1001RCM125XX strap locations  
11  
12  
 
The table below provides an overview of interface strap functions  
for the rear interface cards. Following the table overview are detailed  
descriptions of each strap’s function.  
3.2.2 Model 1001RCM13448C Strap Settings  
Figure 6 shows the strap location for the Model 1001RCM13448C  
(M/34) rear card. This strap determines whether Signal Ground and  
Frame Ground will be connected.  
INTERFACE CARD STRAP SUMMARY TABLE #1  
Strap  
JB3  
Function  
Position 1&2  
Connected*  
Connected*  
Position 2&3  
Open  
DTE Shield (Pin1) & FRGND  
FRGND & SGND  
JB4  
Open  
* Indicates default setting  
JB3  
1 2 3  
DTE Shield (DB-25 Pin 1) & FRGND (JB3)  
In the connected position, this strap links DB-25 pin 1 & frame  
ground. In the open position, pin 1 is disconnected from frame ground.  
JB3  
Position 1&2 = DTE Shield (Pin 1) and FRGND Connected  
Position 2&3 = DTE Shield (Pin 1) and FRGND Not Connected  
JB4  
1 2 3  
Figure 6. 1001RCM13448C strap locations  
SGND & FRGND (JB4)  
In the connected position, this strap links DB-25 pin 7 (Signal  
Ground) and frame ground through a 100 ohm resistor. In the open  
position, pin 7 is connected directly to frame ground.  
The table below provides an overview of interface strap functions  
for the rear interface cards. Following the table overview are detailed  
descriptions of each strap’s function.  
JB4  
INTERFACE CARD STRAP SUMMARY TABLE #2  
Position 1&2 = SGND (Pin 7) and FRGND Connected through  
a 100 ohm resistor  
Position 2&3 = SGND (Pin 7) and FRGND Directly Connected  
Strap  
JB3  
Function  
Position 1&2  
Connected*  
Connected*  
Position 2&3  
Open  
DTE Shield (Pin A) & FRGND  
FRGND & SGND (Pin B)  
JB4  
Open  
* Indicates default setting  
DTE Shield (M/34 Pin A) & FRGND (JB3)  
In the connected position, this strap links M/34 pin A & frame  
ground. In the open position, pin A is disconnected from frame ground.  
JB3  
Position 1&2 = DTE Shield (Pin A) and FRGND Connected  
Position 2&3 = DTE Shield (Pin A) and FRGND Not Connected  
13  
14  
 
SGND & FRGND (JB4)  
In the connected position, this strap links DB-15 pin 1 & frame  
ground. In the open position, pin 1 is disconnected from frame ground.  
JB3  
In the connected position, this strap links Signal Ground and frame  
ground through a 100 ohm resistor. In the open position, signal ground  
is disconnected from frame ground.  
Position 1&2 = DTE Shield (Pin 1) and FRGND Connected  
Position 2&3 = DTE Shield (Pin 1) and FRGND Not Connected  
JB4  
Position 1&2 = SGND and FRGND Connected  
Position 2&3 = SGND and FRGND Not Connected  
SGND & FRGND (JB4)  
In the connected position, this strap links DB-15 pin 8 (Signal  
Ground) and frame ground through a 100 ohm resistor. In the open  
position, pin 8 is connected directly to frame ground.  
JB4  
3.2.3 Model 1001RCM11548C Strap Settings  
Figure 7 shows strap locations for the Model 1001RCM11548C  
(DB-15) rear cards. These straps determine various grounding charac-  
teristics for the terminal interface and twisted pair lines. JB3 and JB4  
are user configurable.  
Position 1&2 = SGND (Pin 8) and FRGND Connected through  
a 100 ohm resistor  
Position 2&3 = SGND (Pin 8) and FRGND Directly Connected  
The table below provides an overview of interface strap functions  
3.2.4 Model 1001RCM11575 Strap Settings  
Figure 8 shows strap locations for the Model 1001RCM11575 (DB-  
15/Dual BNC) rear cards. Figure 8 shows strap locations for the Model  
1001RCM11548C (DB-15) rear cards. These straps determine various  
grounding characteristics for the terminal interface and twisted pair  
lines. JB3 and JB4 are user configurable.  
JB3  
1 2 3  
JB4  
1 2 3  
JB4 JB3  
Figure 7. 1001RCM11548C strap locations  
for the rear interface cards. Following the table overview are detailed  
descriptions of each strap’s function.  
INTERFACE CARD STRAP SUMMARY TABLE #3  
Figure 8. 1001RCM11575 strap locations  
Strap  
JB3  
Function  
Position 1&2  
Connected*  
Connected*  
Position 2&3  
Open  
INTERFACE CARD STRAP SUMMARY TABLE #3  
DTE Shield (Pin1) & FRGND  
FRGND & SGND (Pin 8)  
Strap  
JB3  
Function  
Position 1&2  
Connected*  
Connected*  
Position 2&3  
Open  
JB4  
Open  
DTE Shield (Pin1) & FRGND  
FRGND & SGND (Pin 8)  
* Indicates default setting  
JB4  
Open  
DTE Shield (DB-15 Pin 1) & FRGND (JB3)  
* Indicates default setting  
15  
16  
 
3.3 VT-100 SOFTWARE CONFIGURATION  
3.3.2 Accessing the Menu System  
This section describes the VT-100 configuration using a 1001CC.  
For information on configuration using SNMP through the 1001MC,  
please refer to the 1001MC user manual.  
1) Set the Card Address as described in Section 3.2.1.  
2) Set S2-7 to the OFF position to select VT-100 control.  
3) Power up the terminal and set its RS-232 port as follows:  
The NetLink-E1™rack card features a VT-100 menu-driven system  
that may be used for local configuration and management. Cards are  
configured and managed by setting a separate address for each card  
using hardware switches and then accessing each card using a rack  
mounted NetLink Model 1001CC control card. The software manage-  
ment system is described below. For more information on the Model  
1001CC, please refer to the Model 1001CC user manual.  
NOTE: The Model 1001CC uses an internal bus to communicate  
with the 2701RC. When using software configuration, the rear  
card for the 2701RC should be configured with FRGND and  
SGND connected. Please see section 3.2 for more information  
on configuring your rear card.  
9600 Baud  
8 data bits, 1 stop bit, no parity  
Local echo off  
ANSI or VT-100 emulation  
4) Here is an example of a terminal emulator setup session. In  
normal font are the various parameter types. In bold type are  
the values that should be used for best results. Your terminal  
program’s setup screen may differ from this one:  
3.3.1 Setting the Card Address  
Baud rate: 9600  
Parity: None  
Data Length: 8  
Stop Bits: 1  
The 2701RC contains two rotary switches (S3 and S4) which are used  
to set the address of the card. Figure 8, below, shows a close-up of  
S3 and S4 and the addressable digits.  
Default terminal type:  
Local Echo:  
VT-100  
Off  
S3  
S4  
Add Line Feeds after CRs:  
Received Backspace Destructive:  
Backspace key sends:  
Off  
On  
BS  
XON/XOFF software flow control:  
CTS/RTS hardware flow control:  
DSR/DTR hardware flow control:  
On  
Off  
Off  
0
0
Figure 8. Close-Up of Switches S3 and S4  
Switches S3 and S4: Card Address  
5) Install the 2701RC and the 1001CC Control Card into the rack  
system (see Section 4.0 Installation, page 32, to install the  
2701RC; see the 1001CC User Manual to Install the Model  
1001CC Card and to connect the RS-232 port).  
Switches S3 and S4 are used to set the address of the card.  
Switch S4 is the tens place digit and S3 is the ones place digit.  
Following are examples of address settings (Default Address= “00”)  
6) After your 2701RC units are installed and you have set up  
your Model 1001CC and VT-100 terminal as described above,  
you are ready to access the 2701RC cards. This is done by  
selecting the address for a card using the command “Ctrl-b”  
address <CR>. For example, if your 2701RC has an address  
of “64”, type the following:  
S4  
0
5
S3  
4
2
RDL Type  
Card Address = 04  
Card Address = 52  
Card Address = 86  
8
6
Ctrl b (Hold down the Ctrl key and depress the b character)  
64 (Type in the address 64 )  
<CR> (Depress the Enter/Carriage Return key)  
17  
18  
 
The password prompt will be displayed as shown below.  
3.3.3 Introduction to Main Menu  
After entering the password, you may access all of the system’s  
functions and parameters. The Main Menu looks like this:  
Patton Electronics  
Menu Management  
Enter Password: _  
.
6) Note: The password is case sensitive. Type the password  
and press <Enter>. The factory default password for the unit  
is:  
2701RC  
patton  
NOTE: If the entry is incorrect, the password screen will clear  
and prompt you again for the correct password. The password  
you enter will not be shown. For security, asterisks will be dis-  
played for each letter you type. The maximum length of the  
password, which can include any character the terminal can  
generate, is 16 characters.  
HELPFUL HINTS  
1. To make a selection, key the highlighted letter that corre-  
sponds to a menu selection.  
2. To execute the selection, type [Enter/CR].  
7) The NetLink-E1™ will then display the Main Menu screen.  
3. To toggle between options on a highlighted selection, Press  
[space].  
4. Select d Save Changes from Main Menu after making modi-  
fications to any Model 2701RC parameter. Otherwise,  
changes will be lost when the Model 2701RC is turned off.  
19  
20  
 
3.3.4 System Configuration  
The Main Menu options are briefly described below.  
The System Configuration menu looks like this:  
a
System Configuration options allow you to change various  
aspects of the Model 2701RC operation, e.g., framing, line  
coding, and aggregate bandwidth.  
System Diagnostics/Statistics options allow you to monitor  
the network performance, initiate V.54 loops, local loops, and  
send test patterns. Network performance parameters are  
updated once a second, giving you the ability to quickly deter-  
mine if there is a problem.  
b
Unit Options allow you to customize the Model 2701RC for  
your location. You can change the default header names to  
give each unit a unique name and password. Also, you can  
reset the unit to its default settings without the manual. It also  
has a Service Information screen in case you need technical  
assistance from Patton.  
c
Save Changes Once you have configured the unit to your  
satisfaction, you can save the changes permanently by exe-  
cuting the Save Changes command. This will update the unit’s  
configuration and save all the parameters to permanent mem-  
ory.  
d
e
The System Configuration options are described below:  
Logoff For security, log off the control menu by executing the  
Logoff command. This will blank the screen until an [Enter]  
key is pressed.  
a
Line Format: G.703 (default)  
Options: G.703, G.704  
G.703: G.703 is unframed, 2.048Mb/s. In this case, the DTE rate  
is equal to the line rate at the network interface (NI). CAS MF  
and CRC-4 are disabled.  
G.704: G.704 reserves TS0 for signaling and frame alignment.  
Maximum data rate depends on whether CAS MF is enabled  
or not.  
21  
22  
 
Clocking: Network (default)  
d
b
Line Coding: HDB3 (default)  
Options:  
Network, Internal, External  
Options: AMI, HDB3  
Network: This is the most commonly used setting when connect-  
ing to a carrier’s network. In this mode, the unit recovers the  
clock from the received signal and uses it to transmit data. In  
this way the unit remains synchronized to a master clock. In  
campus applications, one of the units must be set to Internal  
clock, and the other end is set to Network clock. At all times,  
there must be only one clock source. Otherwise, clock slips  
and framing errors and bit errors may occur.  
HDB3: In this line coding, the transmitter substitutes a deliberate  
bipolar violation when excessive zeros in the data stream are  
detected. The receiver recognizes these special violations and  
decodes them as zeros. This method enables the network to  
meet minimum pulse density requirements. Unless AMI is  
required in your application, HDB3 should be used whenever  
possible.  
AMI: Alternate Mark Inversion defines a pulse as a "mark,” a  
binary one, as opposed to a zero. In a E1 network connection,  
signals are transmitted as a sequence of ones and zeros.  
Ones are sent as pulses, and zeros are sent as spaces, i.e.,  
no pulse. Every other pulse is inverted from the previous  
pulse in polarity, so that the signal can be effectively transmit-  
ted. This means, however, that a long sequence of zeros in  
the data stream will cause problems, since the NTU receiving  
the signal relies on the signal to recover the 2.048 Mb/s clock.  
If you must use AMI, you should ensure that the data terminal  
equipment connected to the unit provides a minimally accept-  
able pulse density. For this reason, there are advantages to  
using HDB3 instead.  
Internal: This is commonly used in campus applications, where  
the unit is not connected to the public telephone network  
directly. In this mode, the unit uses the on-board oscillator as  
the transmit clock source.  
External: In this mode, the unit requires a clock signal from the  
DTE via the external clock pin on the DTE interface connec-  
tor. Most applications will use Network or Internal clock  
modes.  
Line Build Out: 120 Ohm (default)  
Options: 120 Ohm, 75 Ohm  
e
120 Ohm: Use with 120 Ohm RJ-48C connector.  
75 Ohm: Use with the 1001RCM11575 rear card. (Dual BNC  
connectors)  
f
CRC-4 Setting: Disabled (default)  
Options: Enabled, Disabled  
CRC-4 Multiframe: CRC-4 Multiframe uses TS0 to carry CRC-4  
information. It operates independently of CAS MF. When  
CRC-4 is enabled, the unit monitors the incoming data stream  
for CRC-4 errors. It transmits CRC-4 error counts to the trans-  
mitting unit . Excessive errors may cause loss of frame or loss  
of sync. If CRC-4 MF is used, both units must be set for CRC-  
4 MF; otherwise, the one using CRC-4 MF will detect a loss of  
sync.  
24  
23  
 
CAS MF Setting: Disabled (default)  
NOTE: If you do not have a terminal, you may force the unit to use the  
DIP switches as the default configuration source by turning off the unit,  
setting all the DIP switches to the ON position, then powering on the  
unit. This will cause the unit to enter a special mode. Then turn off the  
unit and change the switch settings to the desired settings. When you  
turn the unit on again, the unit will be set up with the selected switch  
settings.  
Options: Enabled, Disabled  
g
CAS MF: CAS multiframe uses Timeslot 16 (TS16) to send multi-  
frame (MF) alignment data. In CAS MF, a MF is defined as 16  
frames, where a frame consists of 32 64kb/s timeslots, num-  
bered 0 to 31. TS16 of the first frame in the MF contains the  
CAS MF alignment word in the upper four bits. The alignment  
word is always 0000 (binary). The 2715 does not perform any  
signaling in TS16 other than to insert the MF alignment word,  
in order to maintain MF alignment. When CAS MF disabled,  
the unit transmits user data in TS16; therefore, up to 31 chan-  
nels are available for user data. When it is enabled, TS16 is  
not available to the user. In this case, the user can use up to  
30 channels for data. CAS MF can be used with CRC-4 MF or  
by itself. When enabled, both units must employ CAS MF; if  
one unit is set for CAS MF, and the other is not, the one using  
CAS MF will detect a loss of sync.  
DS0 Channel Configuration Menu [ Bandwidth/# Channels =  
n
2,048k/na] (default)  
The Channel Configuration Menu has a sub-menu that looks  
like this:  
i
V.54 Loops: Enabled (default)  
Options: Enabled, Disabled  
This is a special in-band loopback facility that sends a special pseudo-  
random pattern over the data stream. This is the only loopback that the  
unit can initiate. This is useful for campus applications when you need  
to put a remote unit in loopback. The unit responds to the V.54 loop-  
back command, and the whole process takes only a few seconds to  
complete. When V.54 Loopback is disabled, the unit will not be able to  
send or respond to V.54 loopback commands. The duration of the loop-  
back is limited by the loopback timeout setting. While V.54 is being  
activated, user data is overwritten.  
2701RC  
You may configure the Model 2701RC to operate with any combination  
of active and inactive DS0 channels in this screen. When you execute  
the Save Changes command, the selected settings will be saved to  
permanent memory, and the system will be updated to operate with the  
new channel settings.  
j
Default Config Source: Switch (default)  
Options: EEPROM, Switch  
The Model 2701RC can be initialized via the configuration in the on-  
board permanent memory (EEPROM) or via the internal DIP switches  
(Switch). Once the unit is powered up, you may change the settings  
through the control port or the DIP switches. When you make changes  
through the control port, no changes will take place or be saved to per-  
manent memory until you Save Changes (Main Menu option "d" +  
[Enter]). When you make changes through the switches, all changes  
are made immediately.  
NOTE: In Unframed format, the Bandwidth Selected will display  
“2.048k,” and the Total Channels will display “na.” When using the  
DIP switches to set the bandwidth, the starting channel is always  
channel 1 or 0.  
25  
26  
 
Front Panel Switches: enabled (default)  
The Local Loop test has four states:  
Options: enabled, disabled  
Idle  
LL  
No user-controlled loopbacks are active.  
As the Front Panel Switches may be inadvertently toggled, or in the  
event that the end-user may not need to use the switches, the installer  
may disable the front panel switches. Set Switch S2-6 to determine  
whether the front-panel toggle switches are enabled or disabled.  
The Model 2701RC is in local loopback mode.  
Off  
The Model 2701RC is in remote loopback mode or send-  
ing a pattern. Local loopback is disabled.  
S2-6  
On  
Off  
Option  
LocP  
The Model 2701RC is in Local Loopback mode, and is  
sending a test pattern.  
Front Panel Switches Enabled  
Front Panel Switches Disabled  
b
Remote Loop Idle (default)  
3.2.3 System Diagnostics  
The Remote Digital Loopback (RDL) test checks the performance  
of both the local and remote Model 2701RCs, as well as the communi-  
cation link between them. Data from the local DTE is sent across the  
entire communication circuit and looped back to the local DTE.  
The System Diagnostics/Statistics screen looks like this:  
The Model 2701RC Initiating a RL can be in one of the following  
states:  
Idle  
No user-controlled loopbacks are active.  
TxPr  
The Model 2701RC is sending the preparatory phase pat-  
tern lasting for approximately 2 -5 seconds.  
WtAk The Model 2701RC is waiting for an acknowledgement  
from the remote unit. If the remote unit does not  
respond, the WtAk message will remain on the screen.  
RxAk The Model 2701RC has received an acknowledgement  
from the remote unit.  
Tout  
TM  
The Model 2701RC is waiting before entering the Remote  
Loopback test mode.  
NOTE: This screen is updated once per second.  
The Model 2701RC has successfully negotiated the  
Remote Loopback test and is in control of the remote  
unit. You may send a test pattern at this point by press-  
ing:  
The System Diagnostics/Statistics options and functions are described  
below.  
a
Local Loop Idle (default)  
d <spacebar>  
The Local Loop is a bi-lateral loopback in which the data from the local  
DTE and the data from the remote unit are looped back to their respec-  
tive sources (See Section 5.3). Activate this loop to test the each of  
the DTE’s connection to the Model 2701RC.  
TxTr  
The Model 2701RC is sending a Terminate Loopback  
message to the remote unit. If the remote unit does not  
respond, the local unit will return to the Idle state.  
27  
28  
 
Tx1s  
If the remote Model 2701RC responds to the local Model  
2701RCs terminate loopback request, the local unit then  
sends an all ones pattern before returning to the Idle  
state  
d
Test Pattern Idle (default)  
Options: Idle or Sending  
TxP  
IdlP  
The Model 2701RC is sending a test pattern while in Test  
Mode  
To send a pattern, press the ‘c’ key and press <spacebar> to send the  
test pattern. The “OK” message indicates the received test pattern is  
error-free. The BE” message indicates errors in the received pattern.  
You may also hear a beep (from your termainal) once a second as long  
as the unit detects a bit error in the pattern.  
The Model 2701RC is sending a test pattern in place of  
data. The Model 2701RC is not in test mode.  
The Model 2701RC receiving a RL can be in one of the following  
states:  
Idle  
Indicates that Model 2701RC is not sending a pattern.  
Indicates that Model 2701RC is sending a pattern.  
Sending  
RxPr  
Sack  
The Model 2701RC is receiving a preparatory pattern.  
The Model 2701RC, upon receiving a preparatory pat-  
tern, sends an acknowledgement message.  
Error Insertion Off (default)  
e
Options: On, Off  
RL  
The Model 2701RC is in remote loopback mode.  
You may inject intentional errors into the test pattern by turning Error  
Insertion ON. The Error (ERR) LED will blink once per second.  
RxTr  
The Model 2701RC is receiving a terminate loopback  
message.  
f
Selected Pattern  
WE1s The Model 2701RC is waiting for a sequence of all ones  
and will time out if it does not receive it.  
Options: QRSS, 511, or 2047  
IdleP  
Off  
The Model 2701RC is sending a QRSS, 511 or 2047 pat-  
tern.  
Use this option to select the test pattern used to test the link.  
NI STATUS  
The Model 2701RC is in local loopback.  
The Network interface (NI) status is shown in the middle of the  
Diagnostics/Statistics screen. The brackets  
c
RDL Type: V.54 (default)  
are empty when the link is operating normal-  
ly. Only one error message is provided.  
Options: V.54 or CSU  
The user can set this switch to select the type of remote loop that  
will be initiated by the Model 2701. If set to V.54, the Model 2701 will  
initiate a V.54 loop when Remote Loop is selected by the front panel  
switches. If set to CSU, the Model 2701 will initiate a CSU loop when  
Remote Loop is selected by the front panel switches.  
Receiver Carrier Loss [RCL] occurs when  
255 consecutive zeros have been detected  
at the network interface. RCL clears when a  
pulse is detected.  
S2-3  
Off  
On  
RDL Type  
Initiate a V.54 RDL loop when selected  
Initiate a CSU loopback when selected  
Current DIP Switch Settings  
The Switch settings are displayed here to  
facilitate troubleshooting your unit without  
opening up the unit first.  
30  
29  
 
d
3.2.4 Unit Options  
Loop Timeout  
The Unit Options screen looks like this (factory default):  
The Loop Timeout setting can be set to one of the following:  
00:05 =  
00:10 =  
00:15 =  
00:30 =  
00:45 =  
01:00 =  
01:30 =  
02:00 =  
03:00 =  
NEVER =  
five minutes  
ten minutes  
fifteen minutes  
thirty minutes (default setting)  
forty-five minutes  
one hour  
90 minutes  
two hours  
three hours  
forever—the unit will remain in loopback without user  
intervention.  
e
Tx Data Clock: Internal Tx Clock (default)  
Options: Internal Tx Clock or External Tx Clock  
Switch S2-7 selects the clock that is used to accept the Transmit Data  
from the DTE interface. Standard DTE interfaces will transmit data with  
respect to the External Clock. In some cases a DTE interface will  
transmit with respect to the Transmit clock sent out from the 2701RC.  
Please review the information provided with your DTE equipment for  
more information on its' operation. In most cases when there are errors  
on the line only in the direction of the transmit data, S2-7 can be  
changed to solve the problem.  
a
Header Line 1 &  
Header Line 2  
b
Headers 1 and 2 are provided for easy identification of your unit after  
installation. You may want to give each unit a unique name via the  
header lines to help distinguish one unit from another. You can enter a  
header up to 40 letters long. Two lines provide 80 letters for your use.  
That’s a lot of flexibility!  
S2-7  
Off  
Tx Clock Select  
Transmit data accept with respect to the transmit  
clock from the 2701RC  
On  
Transmit data accept with respect to the external  
clock from the DTE  
Password  
f
The Password facility provides security by allowing only those who  
know the correct password to configure the unit via the control port.  
You can still configure the unit via the DIP switches. The password can  
be up to 16 characters long, with no restriction on the combination of  
characters you can use, so be sure to remember the password. The  
password is case sensitive. If you lose your password, you will lose the  
ability to access the unit via the control port.  
Set to Default Configuration  
You may set the Model 2701RC to its factory default configuration,  
except for the header lines and the password, by executing the Set to  
Default Configuration command.  
31  
32  
 
4.0 INSTALLATION  
Service Information  
f
This section describes the functions of the Model 1001R14 rack  
chassis, tells how to install front and rear Model 2701RC Series cards  
into the chassis, and how to connect to the twisted pair interface and  
the serial interface.  
If you need to contact us for help, you can view the Service Information  
screen. Here is what it looks like:  
4.1 THE MODEL 1001R14 RACK CHASSIS  
The Model 1001R14 Rack Chassis (Figure 9, below) has fourteen  
or sixteen device card slots, plus a single power supply or dual redun-  
dant power supplies. Measuring only 3.5 high, the Model 1001R14 is  
designed to occupy only 2U in a 19 rack. Sturdy front handles allow  
the Model 1001R14 to be extracted and transported conveniently.  
2701RC  
Figure 9. Model 1001R14 Rack Chassis with power supply  
4.1.1 The Rack Power Supply  
The power supply included in the Model 1001R14 rack uses the  
same mid-plane architecture as the modem cards. The front card of  
the power supply slides in from the front, and the rear card slides in  
from the rear. They plug into one another in the middle of the rack.  
The front card is then secured by thumb screws and the rear card by  
conventional metal screws.  
WARNING! There are no user-servicable parts in the  
power supply section of the Model 1001R14 rack. Voltage  
setting changes and fuse replacement should only be per-  
formed by qualified service personnel. Contact Patton  
Electronics Technical Support at (301)975-1000 for more  
information.  
33  
34  
 
Powering up Your 1001R14 Rack  
3. Locate the correct interface on the bottom of the driver board.  
For example, the RS-232/V.35 interface board is marked  
THIS SIDE UP FOR V.35 on one side and THIS SIDE UP  
FOR RS-232 on the other side. Other single interface  
boards (e.g. RS-530) are marked with the with FRONT on  
one side of the board.  
The power supplies that come with your 1001R14 rack system are  
equipped with a power entry connector on the rear power supply card.  
The power supplies are Hot-Swappable, so you are not required to  
remove the cards from the rack while applying power to the system.  
NOTE: Please refer to the Model 1001R14 Series User Manual  
AC and DC Rack Mount Power Supplies for fuse and power card  
replacement information.  
4. Re-orient the interface board into the socket with the appropri-  
ate interface pointed UP and with the arrow pointing toward  
the front panel of the Model 2701RC pc board.  
4.2 INSTALLING THE INTERFACE DRIVER BOARD  
5. Push the Interface Driver Board gently onto the socket and re-  
install into the 1001 rack.  
The DTE electrical interface on the 2701RC is determined by a  
DTE daughter board that is mounted on the main board by a 20 pin  
jumper. Figure 10 shows the Interface Driver Board on the top of the  
2701RC main board.  
4.3 INSTALLING THE MODEL 2701RC INTO THE CHASSIS  
The Model 2701RC is comprised of a front card and a rear card.  
The two cards meet inside the rack chassis and plug into each other  
by way of mating 50 pin card edge connectors. Use the following  
steps as a guideline for installing each Model 2701RC into the rack  
chassis:  
Interface Driver  
Board  
1. Slide the rear card into the back of the chassis along the  
metal rails provided.  
2. Secure the rear card using the metal screws provided.  
3. Slide the card into the front of the chassis. It should meet the  
rear card when it s almost all the way into the chassis.  
4. Push the front card gently into the card-edge receptacle of the  
FRONT RS-530  
rear card. It should click into place.  
5. Secure the front card using the thumb screws.  
NOTE: Since the Model 1001R14 chassis allows hot swapping  
of cards, it is not necessary to power down the rack when you  
install or remove a Model 2701RC.  
Figure 10. Interface Driver Board  
Follow the instructions below to install or change the correct inter-  
face for your application.  
4.4 CONNECTING TO A DTE DEVICE  
1. With the 2701RC front card pulled out of the rack chassis,  
locate the driver board on top of the 2701RC front card.  
The serial port on most rear interface cards are hard-wired as  
DCE (Data Circuit Terminating Equipment). The interfaces are  
designed to plug into a DTE such as a terminal, PC or host computer.  
When making the connection to your DTE device, use a straight  
through cable of the shortest possible length--we recommend 6 feet or  
less. When purchasing or constructing an interface cable, please refer  
to the pin diagrams in Appendix D and Appendix E as guides.  
2. Lift the interface drive board gently off the main PC board.  
35  
36  
 
4.5 CONNECTING TO A DCE DEVICE  
5.0 OPERATION  
The rear interface cards on most interface modules are hard wired  
as DCE . Therefore, you must use a null modem cable when con-  
necting to a modem, multiplexer or other DCE device. This cable  
should be of the shortest possible length--we recommend 6 feet or  
less. When purchasing or constructing a null modem interface cable,  
use the pin diagrams in Appendix C as a guide.  
Once the NetLink-E1™ is installed and configured properly it is  
ready to place into operation. This section describes the function of  
the LED indicators, and the use of the loopback and pattern test  
modes.  
5.1 LED DESCRIPTIONS  
NOTE: Pin-out requirements for null modem applications  
vary between equipment manufacturers. If you have any  
questions about a specific installation, please contact Patton  
Electronics Technical Support.  
The NetLink-E1™ is equipped with nine LED indicators that monitor  
the status of communication. Figure 12 (below) shows the location of  
the LEDs on the NetLink-E1™ Series front panel.  
4.6 CONNECTING THE E1 INTERFACE  
Model 2701RC  
The Network Line Interface is an eight position keyed modular jack  
configured as a RJ-48C. This interface will need to be configured to  
match the line parameters (i.e. framing, line coding, etc.) supplied by  
the central office.  
1 RX Data (TIP)  
2 RX Data (RING)  
3 (no connection)  
From Network  
}
1
Figure 12. Model 2701RC front panel, showing LED indicators.  
2
3
4 TX Data (TIP)  
TXD  
RXD  
LOS  
When the unit sends a one, the TXD LED is  
green. When it sends a zero, the TXD LED  
is yellow. Moreover, the TXD LED is active  
only in active DS0 channels. In inactive  
channels, the TXD LED is off.  
4
5
6
7
8
To Network  
}
5 TX Data (RING)  
6 (no connection)  
7 (no connection)  
8 (no connection)  
NOTE: If the  
Figure 11. NetLink-E1“ twisted pair line interface.  
When the unit receives a one, the RXD LED  
is green. When it receives a zero, the RXD  
LED is yellow. Moreover, the RXD LED is  
active only in active DS0 channels. In inac-  
tive channels, the RXD LED is off.  
NetLink-E1“ is being used for private short range modem appli-  
cations, the twisted pair cable connected to its port will need to be  
a cross-over cable. See Appendix D for Interface pin assignments.  
4.7 CONNECTING DUAL COAX BNC (75 OHM)  
The Loss of Sync LED lights when the unit  
loses synchronization with the incoming sig-  
nal. This may happen when there is a fram-  
ing mismatch or a loss of signal. In  
In addition to the 120 Ohm twisted pair connection, the Model  
2701RC, when used with the 1001RCM11575 rear card, is equipped  
with dual female BNCs (TX and RX) for connection to a 75 ohm dual  
coax G.703 network interface.  
unframed mode, the LOS LED monitors the  
37  
38  
 
status of the transmit clock.  
5.2 LOOP (V.54 & TELCO) DIAGNOSTICS  
The NetLink-E1™ offers three V.54 loop diagnostics and is com-  
patible with two Telco loop diagnostics. Use these diagnostics to test  
the CSU/DSU and any communication links. These tests can be acti-  
vated via the software control port (See Section 3.2.3 System  
Diagnostics), via signals on the serial port interface or the front panel  
switch.  
ALM  
The alarm LED indicates the presence of a  
Blue or Yellow Alarm, or Out of Frame con-  
dition. The ALM LED will blink on every half-  
second. Alarms may occur due to:  
Loss of Synchronization  
• Loss of Frame  
• AIS (Blue Alarm)  
5.2.1 Operating Local Loopback (LL)  
• RAI (Yellow Alarm)  
The Local Loopback (LL) test checks the operation of the local  
NetLink-E1™, and is performed separately on each unit. Any data  
sent to the local NetLink-E1™ in this test mode will be echoed  
(returned) back to the user device (i.e., characters typed on the key-  
board of a terminal will appear on the terminal screen).  
ERR  
The error LED indicates various error condi-  
tions, including framing bit errors, excessive  
zeros, controlled slips, severe errors, or bit  
errors (when sending V.52 test patterns).  
When sending a test pattern, the LED will  
remain lit if the unit does not receive the  
identical pattern. When it receives the cor-  
rect pattern, the LED will turn off. If error  
insertion is on, the LED will blink once a  
second if everything is operating properly.  
G.703/G.704 NTU  
Model 2701 RC  
G.703/G.704 NTU  
Model 2701 RC  
Receive  
Recover  
Clocking  
Serial  
Device  
Internal  
Clocking  
Serial  
Device  
Cable Span  
Clock/  
Data  
Clock/  
Data  
Data  
TST  
The test indicator LED blinks with a specific  
pattern depending on the type of test mode.  
When the unit is in local analog loop, the  
LED will blink on briefly. When the unit is in  
remote loop, the TST LED will blink off  
briefly. When the unit is sending a test pat-  
tern or is putting the remote unit into  
Data  
Clock/  
Data  
Model 2701 RC  
LLB Initiated  
Model 2701RC  
Figure 7. Local Loopback  
V.54/CSU loopback, the TST LED will stay  
on. These are the test modes:  
To perform a LL test, follow these steps:  
V.54/CSU Loopback & V.52 Patterns  
• Local Loopback  
1. Activate LL. This may be done in one of three ways:  
a
a. Enter  
Local Loop from the System  
PWR  
The power indicator LED will remain lit while  
the unit is powered. It turns off when the  
unit is not powered.  
Diagnostics/Statistics menu and toggle the <Spacebar>  
until LL appears next to the a Local Loop option.  
b. Activate the LL signal on the DTE. If you are not sure  
which lead is the LL signal, please refer to Appendix D.  
c. Toggle the front panel switch to the Local position.  
39  
40  
 
2. Verify that the data terminal equipment is operating properly  
and can be used for a test.  
b. Activate the RL signal on the DTE. If you are not sure  
which lead is the RL signal, please refer to Appendix D.  
3. Perform a V.52 BER (bit error rate) test as described in  
Section 5.3. If the BER test equipment indicates no faults,  
but the data terminal indicates a fault, follow the manufactur-  
er s checkout procedures for the data terminal. Also, check  
the interface cable between the terminal and the NetLink-E1.  
c. Set the front panel switch to Remote .  
2. Perform a bit error rate test (BERT) using the internal V.52  
generator (as described in Section 5.3), or using a separate  
BER Tester. If the BER test indicates a fault, and the Local  
Line Loopback test was successful for both NetLink“s, you  
may have a problem with the twisted pair line connection.  
5.2.2 Operating Remote Digital Loopback (RL)  
The Remote Digital Loopback (RL) test checks the performance of  
both the local and remote NetLink-E1™, as well as the communication  
link between them. Any characters sent to the remote NetLink-E1™ in  
this test mode will be returned back to the originating device (i.e, char-  
acters typed on the keyboard of the local terminal will appear on the  
local terminal screen after having been passed to the remote NetLink-  
E1™ and looped back).  
5.2.3 CSU Loop  
The NetLink-E1“ also responds to central office initiated loop com-  
mands. The NetLink-E1“ will implement the loop up command  
when it recognizes the pattern 10000 in the data stream for a mini-  
mum of 5 seconds. The loop down command is implemented by the  
pattern 100 in the data stream for a minimum of 5 seconds.  
G.703/G.704 NTU  
Model 2701 RC  
G.703/G.704 NTU  
Model 2701 RC  
The NetLink-E1™ will respond to Universal Loopback De-activate  
to clear all central office loops.  
Receive  
Recover  
Clocking  
Internal  
Clocking  
Ethernet  
Device  
Serial  
Device  
Cable Span  
Clock/  
Data  
Clock/  
Data  
5.3 BIT ERROR RATE (V.52) DIAGNOSTICS  
Data  
Data  
Clock/  
Data  
The NetLink-E1™ offers three V.52 Bit Error Rate (BER) test pat-  
terns. These test patterns may be invoked along with the LAL and  
RDL tests to evaluate the unit(s) and the communication links.  
Model 2701RC  
Model 2701RC  
RDL Initiated  
When a 511, 2047, or QRSS test is invoked, the NetLink-E1™ gen-  
erates a pseudo-random bit pattern of 511 bits, 2047 bits or 220 bits,  
respectively, using a mathematical polynomial. The receiving NetLink-  
E1™ then decodes the received bits using the same polynomial. If the  
received bits match the agreed upon pseudo-random pattern, then the  
NetLink-E1™(s) and the communication link(s) are functioning properly.  
Figure 8. Remote Loopback  
There are two Remote Loops that can be initiated from the  
NetLink-E1 unit: (1) V.54 Loop, and; (2)CSU Loop. The user can  
select the type of loop that can be initiated from the System  
Diagnostics/Statistics screen or with Switch S2-1. Select c RDL  
Type and press the <spacebar> to toggle between the CSU loop and  
the V.54 loop. When a loopback is initiated this is the type of loop that  
the unit uses to loop up the remote unit. NOTE: The NetLink-E1 will  
respond to both loops regardless of the state of the RDL Type.  
511  
Initiates a built-in 511 bit pseudo-random  
pattern generator and detector.  
2047  
QRSS  
Initiates a built-in 2047 bit pseudo-random  
pattern generator and detector.  
To perform an RDL test, follow these steps:  
Initiates a built-in 220 bit pseudo-random  
pattern generator and detector.  
1. Activate RDL. This may be done in three ways:  
b
a. Enter  
Remote Loop from the System  
Diagnostics/Statistics menu and toggle the <Spacebar>  
until RL appears next to the  
Remote Loop option.;  
b
42  
41  
 
To perform a V.52 test, follow these steps:  
APPENDIX A  
PATTON MODEL 2701RC  
SPECIFICATIONS  
1. Activate the local loopback or remote loopback diagnostic.  
2. Activate the test pattern. This may be done in one of two  
ways:  
Network Data Rate:  
Network Connector:  
2.048 Mbps  
c
a. Enter  
Test Pattern from the System  
RJ-48C or dual BNC  
Diagnostics/Statistics menu and toggle the <Spacebar>  
until the desired test pattern appears.  
Nominal Impedance:  
120 ohm (75 ohm available when using  
Patton Model 1001RCM11575 rear  
card)  
One of two result codes will appear to the right of the  
DTE Interface:  
V.35 (DCE Orientation) X.21 (DCE or  
DTE orientation), RS-530, RS-232,  
10Base-T, Ethernet  
Test Pattern listing:  
c
OK Indicates that the received test pattern is error-free.  
Line Coding:  
Line Framing:  
Selectable AMI or HDB3  
BE Indicates that there are errors in the test pattern (to  
deliberately insert errors in the pattern, toggle  
G.703 (Unframed) or G.704/G.732  
(Framed)  
Error Insertion to ON).  
d
CAS Multiframing:  
CRC-4 Multiframing:  
Clocking:  
Selectable On or Off  
Selectable On or Off  
b. Toggle the front panel switch to either PAT or PAT/E (Test  
Pattern with Error Injection).  
Internal, External, or Receive Recover  
DTE Data Rates:  
64, 128, 192, 256, 320,384, 448, 512,  
576, 640, 704, 768, 832, 896, 960,  
1024, 1088, 1152, 1216, 1280, 1344,  
1408, 1472, 1536, 1600, 1664, 1728,  
1792, 1856, 1920, 1984, 2048 kbps  
Time Slot Rate:  
64 kbps  
DS0 Start Position:  
DS0 Mapping Position:  
Diagnostics:  
Arbitrary  
Contiguous or Arbitrary  
V.54 Loopback; V.52 Patterns: 511,  
2047, and QRSS  
Indicators:  
Power, Transmit Data, Receive Data,  
Alarm, Loss of Sync, Test Mode, Error  
Configuration:  
Two 8-Position DIP Switches, RS-232  
Control Port, or SNMP Managable  
Power Supply:  
Humidity:  
100-240VAC, 50-60Hz, 0.4A  
Up to 90% non-condensing  
0 to 70o C  
Temperature:  
Dimensions:  
9.0 x 5.3 x 2.0 cm (3.5”L x 2.1”W x  
0.78”H)  
43  
44  
 
APPENDIX B  
APPENDIX C  
PATTON NETLINK-E1™ MODEL 2701RC  
CABLE RECOMMENDATIONS  
PATTON NETLINK-E1™ MODEL 2701RC  
FACTORY REPLACEMENT PARTS  
AND ACCESSORIES  
Patton Model #  
Description  
2701RC/D/V........................E1/FE1 CSU/DSU Rack Card, X.21  
Interface w/DB15FS/RJ48C rear card  
The Patton NetLink E1™ Series has been performance tested by  
Patton technicians using twisted-pair cable with the following charac-  
teristics:  
2701RC/B/B ........................E1/FE1 CSU/DSU Rack Card, RS530\  
Interface with DB25F/RJ48C Rear  
Card  
Wire Gauge  
Capacitance  
Resistance  
2701RC/A/I..........................E1/FE1 CSU/DSU Rack Card, V.35  
Interface with M/34F/RJ48C Rear Card  
1001RPEM-RAC  
1001RPEM-RAC  
1001RPSM-RUI...................120/240V Front Power Supply Module  
1001RPEM-RDC.................DC Rear Power Entry Module  
1001RPSM-R48A................48V Front Power Supply Module  
1001R14P ...........................Rack 14 Slot 2U Chassis Only  
1001R14P/R48V .................Rack 14 Slot 2U w/Dual Universal  
Input 48VDC Power Supplies  
19 AWG  
22 AWG  
24 AWG  
83nf/mi or 15.72 pf/ft.  
83nf/mi or 15.72 pf/ft.  
83nf/mi or 15.72 pf/ft.  
.0163 Ohms/ft.  
.0326 Ohms/ft.  
.05165 Ohms/ft.  
120/240V Rear Power Entry Module  
120/240V Rear Power Entry Module  
To gain optimum performance from the Model 2701RC Series,  
please keep the following guidelines in mind:  
1001R14P/RUIA..................Rack 14 Slot 2U w/Dual Universal  
Input 90-260VAC Power Supplies  
Always use twisted pair wire—this is not an option.  
European Power Cord  
• Use twisted pair wire with a capacitance of 20pf/ft or less.  
1001R14P/RUIC .................Rack 14 Slot 2U w/Dual Universal  
Input 90-260VAC Power Supplies  
• Avoid twisted pair wire thinner than 26 AWG (i.e. avoid AWG  
numbers higher than 26)  
Austrialia Power Cord  
1001R14P/RUID .................Rack 14 Slot 2U w/Dual Universal  
Input 90-260VAC Power Supplies  
• Use of twisted pair with a resistance greater than the above  
specifications may cause a reduction in maximum distance obtain-  
able. Functionality should not be affected.  
UK Power Cord  
1001R14P/RUIG .................Rack 14 Slot 2U w/Dual Universal  
Input 90-260VAC Power Supplies  
India Power Cord  
• Many environmental factors can affect the maximum distance  
obtainable at a particular site.  
1001R14P/RUIK..................Rack 14 Slot 2U w/Dual Universal  
Input 90-260VAC Power Supplies  
US Power Cord  
1001RCM12548C ...............DB-25/RJ-45 Rear Card  
1001RCM13448C ...............M/34/RJ-45 Rear Card  
1001CC...............................Control Card  
IM2RC/B..............................RS-530 Interface Rear Card  
1180RC DB.........................V.35 Daughter Board  
05R16BP440W ...................Single Width Blank Rear Panel, White  
05R16FP440W....................Single Width Blank Front Panel, White  
0516FPB1 ...........................Single Width Blank Front Panel, Black  
0516FPB4 ...........................4-Wide Blank Front Panel, Black  
0516RPB1...........................Single Width Blank Rear Panel, Black  
0516RPB4...........................4-Wide Blank Rear Panel, Black  
056S1..................................Set of 16 #4 pan head screws/washers  
10-25M/35M-1.....................Cable, 6 ft, DB-25 male to M/34 male  
1010-10...............................Terminal Block, 2 Position, Male  
07M2701RC........................User Manual  
45  
46  
 
APPENDIX D  
APPENDIX E  
PATTON NETLINK-E1™ MODEL 2701RC  
E1 INTERFACE PIN ASSIGNMENT  
PATTON NETLINK-E1™ MODEL 2701RC  
V.35 INTERFACE PIN ASSIGNMENT  
M/34 Connector, Terminal Interface  
RJ-48C E1 (DS0) Network Interface  
(Female Modular Jack)  
Pin #  
A
Signal  
GND (Earth Ground/Shield)  
B
SGND (Signal Ground)  
Pin #  
Signal  
1
2
4
5
RX Data (TIP 1)  
RX Data (RING1)  
TX Data (TIP)  
D
CTS (DCE Source)  
From Network  
}
E
DSR (DCE Source, Always On)  
CD (DCE Source)  
To Network  
}
F
TX Data (RING)  
L
LL (Local Loop, DTE Source)  
TM (Test Mode Indicator, DCE Source)  
RL (Remote Loop, DTE Source)  
TD (Transmit Data +, DTE Source)  
RD (Receive Data +, DCE Source)  
TD/ (Transmit Data -, DTE Source)  
RD/ (Receive Data -, DCE Source)  
XTC (Transmit Clock +, DTE Source)  
RC (Receiver Clock +, DCE Source)  
XTC/ (Transmit Clock -, DCE Source)  
RC/ (Receiver Clock -, DCE Source)  
TC (Transmitter Clock +, DTE Source)  
TC/ (Transmitter Clock -, DTE Source)  
M
N
P
R
S
T
U
V
W
X
Y
AA  
47  
48  
 
APPENDIX E  
APPENDIX E  
(continued)  
(continued)  
PATTON NETLINK-E1™ MODEL 2701RC  
EIA-530 INTERFACE PIN ASSIGNMENT  
DB-25 Female Connector, Terminal Interface  
PATTON ELECTRONICS MODEL 2701RC  
INTERFACE PIN ASSIGNMENT  
X.21 Interface  
(DB-15 Female Connector)  
(DTE /DCE Configuration)  
Pin #  
1
Signal  
FG (FrameGround)  
Pin #  
Signal  
2
TD (Transmit Data-A, DTE Source)  
RD (Receive Data-A, DCE Source)  
RTS (Request to Send-A, DTE Source)  
CTS (Clear to Send-A, DCE Source)  
DSR (Data Set Ready-A, DCE Source)  
SGND (Signal Ground)  
1. . . . . . . . . . . . Frame Ground  
2. . . . . . . . . . . . T (Transmit Data-A)  
3. . . . . . . . . . . . C (Control-A)  
4. . . . . . . . . . . . R (Receive Data-A)  
5. . . . . . . . . . . . I (Indication-A)  
6. . . . . . . . . . . . S (Signal Element Timing-A)  
7 . . . . . . . . . . . BT (Byte Timing-A)  
8 . . . . . . . . . . . SGND (Signal Ground)  
9 . . . . . . . . . . . T/ (Transmit Data-B)  
10 . . . . . . . . . . . C/ (Control-B)  
11 . . . . . . . . . . . R/ (Receive Data-B)  
12 . . . . . . . . . . . I/ (Indication-B)  
13........................S/ (Signal Element Timing-B)  
3
4
5
6
7
8
CD (Carrier Detect-A, DCE Source)  
RC/ (Receiver Clock-B, DCE Source)  
CD/ (Carrier Detect-B, DCE Source)  
XTC/(External Transmitter Clock-B, DTE Source)  
TC/(Transmitter Clock-B, DTE Source)  
CTS/(Clear to Send-B, DCE Source)  
TD/(Transmit Data-A, DTE Source)  
TC(Transmitter Clock-B, DCE Source)  
RD (Receive Data-A, DCE Source)  
RC (Receiver Clock-A, DCE Source)  
LL (Local LIne Loop)  
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
22  
23  
24  
25  
14 .......................BT/ (Byte Timing-B)  
RTS/(Request to Send-B, DTE Source)  
DTR (Data Terminal Ready-A, DTE Source)  
DSR/ (Data Set Ready-B, DCE Source)  
DTR/(Data Terminal Ready-B, DTE Source)  
XTC (External Transmitter Clock-A, DTE Source)  
TM (Test Mode)  
50  
49  
 

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