Patton electronic Network Card 1088 K User Manual

USER  
MANUAL  
MODEL 1088/K  
mDSL Modem With Fixed  
G.703/G.704 Interface  
Part# 07M1088K-UM  
SALES OFFICE  
(301) 975-1000  
TECHNICAL SUPPORT  
(301) 975-1007  
Doc# 03314U2-001  
Rev. E  
Revised 11/6/06  
An ISO-9001Certified  
Company  
 
A.9 Line Rates (DSL line) .................................................................. 27  
A.11 G.703/G.704 Specific ................................................................. 27  
A.13 Line coding ................................................................................. 27  
A.14 Line Framing ............................................................................... 27  
A.16 Physical Connection ................................................................... 27  
B
Factory Replacement Parts and Accessories........................ 28  
C
Transmission Distance Chart.................................................. 29  
D
Model 1088/K LED Descriptions.............................................. 30  
3
 
1.0 WARRANTY INFORMATION  
Patton Electronics warrants all Model 1088 components to be free from  
defects, and will—at our option—repair or replace the product should it  
fail within one year from the first date of shipment.  
This warranty is limited to defects in workmanship or materials, and does  
not cover customer damage, abuse or unauthorized modification. If this  
product fails or does not perform as warranted, your sole recourse shall  
be repair or replacement as described above. Under no condition shall  
Patton Electronics be liable for any damages incurred by the use of this  
product. These damages include, but are not limited to, the following:  
lost profits, lost savings and incidental or consequential damages arising  
from the use of or inability to use this product. Patton Electronics specifi-  
cally disclaims all other warranties, expressed or implied, and the instal-  
lation or use of this product shall be deemed an acceptance of these  
terms by the user  
Note Conformity documents of all Patton products can be viewed  
1.1 RADIO AND TV INTERFERENCE  
The Model 1088 generates and uses radio frequency energy, and if not  
installed and used properly—that is, in strict accordance with the manu-  
facturer's instructions—may cause interference to radio and television  
reception.The Model 1088 has been tested and found to comply with the  
limits for a Class A computing device in accordance with the specifica-  
tions in Subpart J of Part 15 of FCC rules, which are designed to provide  
reasonable protection from such interference in a commercial installa-  
tion. However, there is no guarantee that interference will not occur in a  
particular installation. If the Model 1088 does cause interference to radio  
or television reception, which can be determined by disconnecting the  
unit, the user is encouraged to try to correct the interference by one or  
more of the following measures: moving the computing equipment away  
from the receiver, re-orienting the receiving antenna and/or plugging the  
receiving equipment into a different AC outlet (such that the computing  
equipment and receiver are on different branches).  
1.2 CE NOTICE  
The CE symbol on your Patton Electronics equipment indicates that it is  
in compliance with the Electromagnetic Compatibility (EMC) directive  
and the Low Voltage Directive (LVD) of the European Union (EU). A Cer-  
tificate of Compliance is available by contacting Technical Support.  
4
 
     
1.3 SERVICE  
All warranty and non-warranty repairs must be returned freight prepaid  
and insured to Patton Electronics. All returns must have a Return Materi-  
als Authorization number on the outside of the shipping container. This  
number may be obtained from Patton Electronics Technical Services at:  
Tel: +1 (301) 975-1007  
Note Packages received without an RMA number will not be  
accepted.  
Note The Model 1088 is flash upgradeable. Please refer to Patton  
website, or contact Technical Support for the latest version of  
the software.  
5
 
 
2.0 GENERAL INFORMATION  
Thank you for your purchase of this Patton Electronics product. This  
product has been thoroughly inspected and tested and is warranted for  
One Year parts and labor. If any questions or problems arise during  
installation or use of this product, please do not hesitate to contact Pat-  
ton Electronics Technical Support at (301) 975-1007.  
2.1 FEATURES  
• Multi-Rate Symmetric DSL  
• Supports DTE Speeds from 64 kbps to 2.048 Mbps  
• 2-wire Operation  
• 120 ohm (RJ-48C) and 75 ohm (dual coax) G.703/G.704 terminations  
• 2-Mbps G.703 Clear Channel (Unframed) or nx64 G.704 (Framed)  
Operation  
• SNMP Manageable as the CP (Customer Premises) modem when  
connect to Model 1095RC  
• Selectable AMI or HDB3 Line Coding  
• LED indicators for DSL Link, E1/FE1 Link, LOS, TM, ER and NS  
2.2 DESCRIPTION  
The Patton Electronics mDSL Rocket offers the ability to extend G.703/  
G.704 service over Multi-rate Symmetric Digital Subscriber Line technol-  
ogy. Multi-rate DSL offers the ability to deliver the maximum bit rate that a  
twisted pair line can accommodate. Now, ISPs, CLECs and corporate  
enterprises can terminate G.703/G.704 (E1) service and either extend  
nx64 G.703/G.704 service or provide a remote serial connection to a  
router or switch when paired with Model 1088/C (V.35) or 1088/D (X.21).  
As Model 1088/K receives data from E1 line, it extracts the E1 clock, and  
delivers smooth clock and data to the remote DSL modem over a two-wire  
DSL span. In a network extension application, a remote 1088/K delivers  
nx64kbps to 2 Mbps G.703 data and clocking to device with an E1 inter-  
face. In a network termination application, a remote Model 1088/C or  
1088/D accepts this data and clock stream and provides nx64kbps data to  
CPE with a V.35, or X.21 interface.  
As a symmetric DSL NTU, Model 1088/K offers the same data rates in  
both directions over a single pair of regular telephone lines using Carrier-  
less Amplitude and Phase (CAP) modulation. Equipped with 75 ohm (dual  
coax) and 120 ohm (RJ-48C), the Model 1088/K is easy to configure and  
install. DSL line connection is via RJ-45 jack. Standard versions of Model  
1088 are powered by a 100/230VAC (Universal) supply. A DC power sup-  
ply option supports any DC input between 36–72VDC.  
6
 
     
3.0 INSTALLATION  
The Model 1088/K is equipped with two sets of eight DIP switches, which  
allow configuration of the unit for a wide variety of applications.This section  
describes switch locations and explains all possible configurations.  
3.1 CONFIGURING THE HARDWARE DIP SWITCHES  
The 16 external switches are grouped into two eight-switch sets, and are  
externally accessible from the underside of the Model 1088/K (See  
Figure 1).  
Figure 1. Underside of Model 1088/K showing location of DIP switches  
The two sets of DIP switches on the underside of the Model 1088/K will  
be referred to as S1 and S2. As Figure 2 shows, the orientation of all DIP  
switches is the same with respect to “ON” and “OFF” positions.  
ON  
OFF  
Figure 2. Close-up of configuration switches (all sets are identical in appearance)  
7
 
       
Configuration DIP Switch Set “S1”  
Switches S1-1 through S1-8 may be used to configure CO/CP operation,  
line framing and coding, CRC-4 operation, and DTE initiated loop diag-  
nostics. Default settings of S1 switches are shown in Table 1.  
Table 1: S1 Summary Table  
Position Function  
Factory Default  
S1-1  
S1-2  
S1-3  
S1-4  
S1-5  
S1-6  
S1-7  
S1-8  
CO/CP Setting  
On CP Mode  
Off HDB3  
Off Disabled  
Off  
On  
Off  
On  
Off  
Line Coding  
CRC-4 Enable  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Switch S1-1: CO/CP. Use Switch S1-1 configure the CO (located at the  
Central Office or or G.703/G.704 demarcation point) or CP (located at  
the Customer Premises) mode of the 1088/K.  
S1-1  
CO/CP Mode  
Off  
On  
CO = located at the Central Office  
CP = located at the Customer Premises  
CO/CP Configuration. The Model 1088/K does not use clock mode set-  
tings as described in other Patton mDSL products. Instead, the Model  
1088/K will always recover the clocking from the G.703/4 network and  
use this clock to send data across the DSL span to the remote DSL  
modem, which will use the incoming to send data out to G.703/4 net-  
work.Therefore, one unit must be set for CO mode (located at the G.703  
demarcation), and the other unit must be set for CP mode (located at the  
customer premises). This type of clocking method was employed for two  
reasons:  
To allow two independent networks to use the modems as indepen-  
dent clocking paths.  
To allow the user to independently specify the timing source for the  
network based on external equipment.  
CO/CP and Using the 1088/K with other Patton mDSL modems  
Other Patton mDSL modems allow the option of specifying the clock  
mode, but not the CO/CP designation. This is already done internally  
8
 
       
within the unit. When connecting a 1088/K to an mDSL modem (e.g.  
Model 1088/C, 1088/D or 1095) other then a Model 1088/K, determine  
the source of the system clock and then determine the Model 1088/Ks  
CO/CP designation based upon the following chart.  
MDSLModem  
Clock Mode  
MDSL Modem  
Unit Designation  
1088/K setting  
required  
External  
Internal  
External  
Internal  
CP  
CP  
CO  
Receive  
Recover  
Receive Recover  
Note In each DSL modem pairing, one unit must act as the CO unit,  
the other must act as the CP unit.  
Switch S1-2: Line Coding. Use Switch S1-2 to configure the G.703/  
G.704 network line coding. The line coding must be the same line cod-  
ing prescribed by the NAP (Network Access Provider). Most applications  
will use HDB3  
SW4 Line Framing & Coding  
Off  
On  
HDB3  
AMI  
Line Coding Options:  
High Density Bipolar 3 (HDB3): In HDB3 coding, the transmitter  
deliberately inserts a bipolar violation when excessive zeros in the  
data stream are detected. The receiver recognizes these special viola-  
tions and decodes them as zeros.This method enables the network to  
meet minimum pulse density requirements. Use HDB3 unless AMI is  
required in your application .  
Alternate Mark Inversion (AMI): AMI coding does not inherently  
account for ones density. To meet this requirement, you should ensure  
that the data inherently meets pulse density requirements.  
9
 
 
Switch S1-3: CRC-4 Multiframe. CRC-4 Multiframe uses Time Slot  
zero to carry CRC-4 information. When CRC-4 is enabled (ON), the unit  
synchronizes to the CRC-4 multi-frame protocol.  
S1-3  
Option  
Off  
On  
Disabled  
Enabled  
Note When the DTE rate is set to 2048 Kbps, Model 1088/K transmits  
user data on all 32 timeslots, ignoring framing information. In this  
case, Switch S1-3 will need to be in the disabled (Off) position.  
Switches S1-4, S1-5, S1-6, S1-7 and S1-8: Reserved. Switches S1-4,  
S1-5, S1-6, S1-7, S1-8 are reserved for factory usage and must remain  
in the default configuration, except when using the Netlink Plug-and-Play  
feature.  
S1-4 S1-5 S1-6 S1-7 S1-8  
Off On Off On Off  
Default Setting  
Only Valid Setting  
Configuration DIP Switch Set “S2”  
Use the eight DIP Switches in Switch S2 to enable the DTE connection  
rate. The following table summarizes default positions of DIP Switch S3.  
Detailed descriptions of each switch follow Table 2.  
Table 2: S2 Summary Table  
Position  
S2-1  
S2-2  
S2-3  
S2-4  
S2-5  
S2-6  
S2-7  
S2-8  
Function  
DTE Rate  
Factory Default  
Off  
Off  
DTE Rate  
DTE Rate  
On  
2048 kbps  
DTE Rate  
On  
}
DTE Rate  
On  
DTE Rate  
Off  
Reset Software Defaults  
Transmit Data Sample Point  
On Normal Operation  
On Normal Operation  
10  
 
       
Switch S2-1: DTE Rate. Use Switch S2-1 through S2-6 to set the DTE  
bit rate.  
S2-1 S2-2 S2-3 S2-4 S2-5 S2-6 DTE Rate (kbps)  
Off  
On  
Off  
On  
Off  
On  
Off  
On  
Off  
On  
Off  
On  
Off  
On  
Off  
On  
Off  
On  
Off  
On  
Off  
On  
Off  
On  
On  
Off  
On  
Off  
On  
Off  
On  
Off  
Off  
On  
On  
Off  
Off  
On  
On  
Off  
Off  
On  
On  
Off  
Off  
On  
On  
Off  
Off  
On  
On  
Off  
Off  
On  
On  
Off  
On  
On  
Off  
Off  
On  
On  
Off  
Off  
On  
Off  
Off  
Off  
Off  
On  
On  
On  
On  
Off  
Off  
Off  
Off  
On  
On  
On  
On  
Off  
Off  
Off  
Off  
On  
On  
On  
Off  
Off  
Off  
Off  
On  
On  
On  
On  
On  
On  
On  
On  
On  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
On  
On  
On  
On  
On  
On  
On  
On  
Off  
Off  
Off  
Off  
Off  
Off  
Off  
On  
On  
On  
On  
On  
On  
On  
On  
On  
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  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
On  
Off  
Off  
Off  
Off  
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  
Note Based on the DTE rate chosen, the Model 1088/K will automati-  
cally select the optimum line rate for the distance. This selection  
is based on the lowest line rate that will support the DTE rate.  
11  
 
 
Switch S2-7: Reset Software Defaults. Switch S3-7 allows the user to  
reset the software configured factory defaults. This will only be needed  
when using the Model 1001MC to SNMP manage your units. For more  
information, please refer to the Model 1001MC Operations Manual.  
S3-7  
Setting  
On  
Off  
Normal Operation  
Reset  
Switch S2-8: Transmit Data (TD) Sampling Point. Switch 3-8 controls  
the Transmit Data (TD) sampling point.  
S3-8 Setting  
Description  
On  
Normal TD sampled on the falling edge of the 1088 Trans-  
mit Clock (TC)  
Off  
Invert  
TD sampled on the rising edge of the 1088 Transmit  
Clock.  
3.2 NETLINK PLUG-AND-PLAY  
The NetLink Plug-and-Play feature allows ISPs, carriers and PTTs to  
quickly upgrade the link speed for a customer without requiring a visit to  
re-configure the Customer Premise (CP) Model 1088. This feature also  
allows service providers to set up all of the configurations at the Central  
Office (on the rack cards) before installing the stand alone units, saving  
time spent configuring or re-configuring DIP switches.  
Note NetLink Plug-and-Play is only available when using a rack-  
mounted NetLink Model 1095RC as the CO unit.  
The NetLink Plug-and-Play feature allows the user to configure the DTE  
rate (bandwidth allocation, see Switches S2-1 through S2-6) of the CP  
unit from the rack card at the Central Office (CO).The stand alone unit at  
the Customer Premise (CP) site will automatically configure itself to the  
DTE rate (Bandwidth Allocation) of the rack card. Other configuration  
parameters remain in the default setting.  
Follow the instructions below to activate NetLink Plug-and-Play between  
CO (Model 1095RC and CP (Model 1088) units:  
• Set the Model 1095RC (CO) to either Internal or External clocking  
mode as defined by the application.  
12  
 
     
• Set the Model 1088 (CP) to “NetLink Plug-and-Play CP” by setting S1  
and S2 DIP switches in the ON position as described in Figure 3.  
DSL Span  
1095RC  
(CO)  
1088  
(CP)  
DIP Switches all in ON position  
DIP Switches or NMS configured  
according to specific application  
requirements  
Figure 3. Typical NetLink Plug-and-Play Application  
When the CO and CP units connect over DSL, the CP will enter a pre-  
defined default configuration (Receive Recovered Clocking). During the  
negotiation process between the units, the CO unit will configure the  
DTE rate/line rate on the CP unit as defined by the settings of the CO  
unit. When additional bandwidth is required, only the configuration of the  
CO unit should be changed.This feature gives ISPs, LECs and PTTs the  
ability to provision bandwidth on an as needed basis to customers.  
The NetLink Plug and Play application will also work in an HTTP/SNMP  
managed system using the NetLink Model 1001MC SNMP agent card  
with 1095RC cards installed in Patton’s 2U rack system. In this applica-  
tion, the system administrator can configure the entire rack through the  
Network Management Station (NMS) before the stand alone (CP) units  
are installed. For more information on the HTTP/SNMP management,  
please refer to the Model 1001MC Operations Manual.  
13  
 
 
4.0 INSTALLATION  
Once the Model 1088/K is properly configured, it is ready to connect to  
the twisted pair interface, to the serial port, and to the power source.This  
section describes how to make these connections.  
4.1 CONNECT G.703 NETWORK  
The Power, G.703/G.704 and DSL Line connections are located on the  
rear panel of the Model 1088/K. Figure 4 shows the location of each of  
these ports.  
Power  
G.703/G.704 Terminations  
DSL Line  
RX  
TX  
Figure 4. Model 1088/K Rear Panel  
4.2 JUMPER CONFIGURATION  
The Model 1088/K has four jumpers (two position headers): JP1, JP4,  
JP5, and JP6. These jumpers are used to select input or output imped-  
ance matching between the module, external line, and to employ either  
BNC or RJ-48C interface. Figure 5 (below) shows the top view of the  
printed circuit board (PCB) and the location of the jumpers.  
RX  
TX  
Figure 5. Top view of 1088/K, location of JP1, JP4, JP5, and JP6  
14  
 
       
The following is a description of the jumper settings with respect to the  
rear panel connectors.  
• Fora75-ohmconnection(coax)insertJP1, JP4, JP5, andJP6  
(default)  
• For a 120-ohm connection (RJ45) remove JP1 and JP4, JP5, and  
JP6.  
Connect Twisted Pair (120 ohm) to G.703 Network  
The Model 1088/K is equipped with a single RJ-48C jack for connections  
to a 120 ohm twisted pair G.703/G.704 network interface. If your G.703/  
G.704 network terminates via RJ-48C, use the diagram below and the  
table on the following page to make the proper connections. The connec-  
tor pinout and signals are shown in Figure 6.  
RJ-48C Jack  
Signal Name  
1
2
3
4
5
6
7
8
(RX) Receive (Ring)  
(RX) Receive (Tip)  
Shield  
(TX) Transmit (Ring)  
(TX) Transmit (Tip)  
Shield  
1
2
3
4
5
6
7
8
No connection  
No connection  
Figure 6. 120 Ohm RJ-48C G.703 Interface  
Use the following connection diagram to connect the 120 ohm G.703/  
G.704 network channel.  
RJ-48C Cable (8-Wire)  
1088/K  
G.703/G.704  
SIGNAL  
PIN#  
NETWORK SIGNAL  
RX(R)  
RX(T)  
1-----------------------TX(R)  
2-----------------------TX(T)  
TX(R)  
TX(T)  
5-----------------------RX(R)  
4-----------------------RX(T)  
Shield  
Shield  
3-----------------------Shield  
6-----------------------Shield  
Connect Dual Coaxial Cable (75 ohm) to G.703 Network  
The Model 1088/K is also equipped with dual female BNCs (TX and RX)  
for connection to a 75 ohm dual coax G.703 network interface. If your  
15  
 
     
G.703/G.704 network terminates via dual coaxial cable, use the diagram  
below to make the proper connections.The connector pinout and signals  
are shown in Figure 7.  
Network  
TX  
RX  
(Data TO  
G.703/G.704  
Network)  
(Data FROM  
G.703/G.704  
Network)  
Figure 7. 75-ohm Dual Coaxial G.703 Interface  
Note The outer conductor of the coax cables are isolated from system  
earth ground.  
4.3 CONNECT TWISTED-PAIR DSL INTERFACE  
The Model 1088/K supports communication between two DTE devices at  
distances to 5 miles (8 km) over 24 AWG (.5 mm) twisted pair wire. Two  
things are essential:  
• These units operate as a pair. Both units at the end of the twisted pair  
DSL span must be set for the same DTE rate.  
To function properly, the Model 1088 needs one twisted pair of metal-  
lic wire. This twisted pair must be unconditioned, dry, metallic wire,  
between 19 (.9mm) and 26 AWG (.4mm) (the higher number gauges  
will limit distance). Standard dial-up telephone circuits, or leased cir-  
cuits that run through signal equalization equipment, or standard, flat  
modu-lar telephone type cable, are not acceptable.  
The RJ-48C connector on the Model 1088’s twisted pair interface is  
polarity insensitive and is wired for a two-wire interface. The signal/pin  
relationships are shown in Figure 8.  
1 (N/C)  
2 (N/C)  
3 (N/C)  
4 (2-Wire TIP)  
5 (2-Wire RING)  
6 (N/C)  
1
2
3
4
5
6
7
8
7 (N/C)  
8 (N/C)  
Figure 8. Model 1088 twisted pair line interface.  
16  
 
     
4.4 POWER CONNECTION  
Universal AC Power (100–240 VAC)  
The Model 1088 uses a 5 VDC, 2 A universal input 100–240 VAC, power  
supply (center pin is +5V). The universal input power supply has a male  
IEC-320 power entry connector. This power supply connects to the  
Model 1088 by means of a barrel jack on the rear panel. Many interna-  
tional power cords are available for the universal power supply (refer to  
Appendix B for country-specific power cords.  
The Model 1088 powers up as soon as it is plugged into an AC outlet—  
there is no power switch.  
120 VAC Power (US)  
The 100–132 VAC adapter supplied with the U.S. version of the Model  
1088 is a wall mount type and may be plugged into any approved  
120 VAC wall jack.  
230 VAC Power (International)  
The 230 VAC adapter supplied with the International version of the Model  
1088 is a wall mount type and may be plugged into any approved 230  
VAC wall jack.  
DC Power  
The 36-60 VDC DC to DC adapter is supplied with the DC version of the  
Model 1088. The black and red leads plug into a DC source (nominal  
48VDC) and the barrel power connector plugs into the barrel power sup-  
ply jack on the rear panel of the 1088. (See Figure 9).  
To Power  
To -48VDC  
Supply Jack  
Source  
-Vin  
Black lead (-V)  
Red lead (+V)  
+Vin  
Barrel power connector  
Figure 9. Connecting DC Power to the 48V-PSM3 DC Power Supply  
There are no user-serviceable parts in the power supply  
section of the Model 1088. Fuse replacement should  
only be performed by qualified service personnel. Con-  
tact Patton Electronics Technical support at (301)975-  
e-mail at [email protected], for more information.  
WARNING  
17  
 
       
5.0 OPERATION  
Once the Model 1088 is properly configured and installed, it should oper-  
ate transparently. This sections describes power-up, reading the LED  
status monitors, and using the built-in loopback test modes.  
5.1 POWER-UP  
To apply power to the Model 1088, first be sure that you have read sec-  
tion 4.3, “Connect Twisted-Pair DSL Interface” on page 16, and that the  
unit is connected to the appropriate power source.  
5.2 LED STATUS MONITORS  
The Model 1088 features six front panel LEDs that monitor power, the  
DTE signals, network connection and test modes. Figure 10 shows the  
front panel location of each LED. Following Figure 10 is a description of  
each LEDs function. See also APPENDIX E.  
Figure 10. Model 1088/K Front Panel  
DSL LInk  
(Active Green) Solid green (On) indicates that the  
end to end DSL Framer Link is up, signifying that  
the link across the DSL span is active. The DSL  
Link LED is Off when the link is down.  
E1/FE1  
Link  
(Active Green) Solid green (On) indicates a valid  
E1 connection.  
LOS  
(Active Red) The Loss of Sync indicates that the  
unit has lost synchronization with the incoming sig-  
nal. This may happen when there is a framing mis-  
match or a loss of signal. In unframed mode, the  
LOS LED monitors the status of the transmit clock.  
NS  
(Active Red) The No Signal LED glows red to indi-  
cate that the local Model 1088 is not connected  
with the remote Model 1088.  
18  
 
     
ER  
(Flashing Red) - blinks ON/OFF after a 511/511E  
test has timed out. See Section 5.3.3 (Test Pattern  
Generator) for more information.  
• Flashes once to indicate that a CRC error has  
occurred (during normal operation) or bit errors  
have occurred (during 511/511E tests).  
• Only at power up, blinks once every 200 ms if the  
DTE Rate is set to an unsupported settings  
TM  
(Active Yellow) glows yellow to indicate that the  
Model 1088/K has been placed in Test Mode. The  
unit can be placed in test mode by the local user or  
by the remote user. The TM LED will flash for  
400 msec when a valid packet is received from the  
Model 1001MC.  
5.3 TEST MODES  
The Model 1088 offers two proprietary loopback test modes, plus a built-  
in V.52 BER test pattern generator to evaluate the condition of the  
modems and the communication link. These tests can be activated phys-  
ically from the front panel.  
Overview  
Figure 11 below shows the major elements used in the loop-back and  
pattern tests available in the Model 1088. Each block has several func-  
tions. Following Figure 11 are descriptions that show how the elements  
are used during Test Modes.  
Pattern  
Gen/Det  
Pattern  
Gen/Det  
Loop  
Control  
Loop  
Control  
Framer  
Framer  
Line  
Processor  
Figure 11. Block Diagram Model 1088  
Processor  
Framer  
The framer is used to determine the status of the line. In normal  
operation the framer transmits and expects to receive framed  
packets from the far end. If the framer receives framed packets  
from the far end, the DSL Link LED will be active. If framed pack-  
ets are not received, the DSL Link LED will be inactive. The restart  
procedure uses this information to determine if a valid connection  
19  
 
   
is made (cable disconnect, poor cable quality, etc). In normal  
Data Mode, if the box receives 4 seconds of unframed packets it  
will restart the box and begin trying to re-establish a connection  
with the far end. The distinction between framed packets and  
unframed packets becomes important when we discuss the Pat-  
tern Generator.  
Pattern Gen/Det  
This part of the Processor generates and detects the 511/511E  
patterns. When transmitting 511 patterns, the information is  
unframed (because it originates after the framer) and is intended to  
be evaluated only by another Processor. If the units are in Data  
Mode and the pattern generator is enabled on one end of the link,  
the far end will begin receiving unframed packets and assume that  
the line has gone down. During test modes, we force the pattern  
generator to time out before it can cause the link to be killed.  
Loop Control  
This part of the Processor is used to control loop-backs. In a Local  
Loop, the data is looped back towards the local DTE (G.703/  
G.704). In a Remote Loop, the data is looped back to the line, but it  
is also allowed to pass through to the framer and to the remote  
DTE (G.703/G.704).  
Restart Procedure andTime Outs  
The restart procedure is in place to allow theunits to re-establish a  
connection after the framer begins seeing unframed packets.The  
Test Model Timing Chart below shows the amount of time the  
framer must see consecutive unframed packets before the unit will  
restart and try to establish a new line connection.The reason that  
there are different Restart Times will become apparent after read-  
ing the rest of the document.The 511/511E Time Out shown refers  
to the amount of time the 511/511E pattern will be valid. At the end  
of this time the pattern will automatically turn itself off and the nor-  
mal data path will be re-established.The ER led will flash indicating  
to the user that the test has timed out.The ER led will stop flashing  
once the 511/511E switch is placed into the normal position.  
Item  
Elapsed Time (seconds)  
Start Up  
50  
4
Data Mode  
511/511E Generator Enabled 60 (The generator will stop after 45 seconds.)  
Remote End of an RDL  
511/511E Time Out  
60  
45 (The pattern generator will automatically turn  
off after 45 seconds. The ER LED will flash until  
the user turns off the 511/511E switch.)  
20  
 
Symbol Indicators  
This symbol designates the origination or the  
termination of a data path. The direction of the  
arrow connected distinguish the two data paths.  
This symbol designates an invalid data path. If  
there is data present it should be ignored.  
5.4 LOOPS AND PATTERNS  
The following section describes the Test Modes used in the Model 1088. At  
the bottom of each Test Mode, a figure is included to show the data path.  
Pattern  
Gen/Det  
Loop  
Control  
Loop  
Control  
Framer  
Pattern  
Gen/Det  
Framer  
Line  
Processor  
Processor  
Figure 12. Block Diagram Local Loop Mode 1  
Pattern  
Gen/Det  
Loop  
Control  
Loop  
Control  
Framer  
Pattern  
Gen/Det  
Framer  
Line  
Processor  
Processor  
Figure 13. Block Diagram Local Loop Mode 2  
Local Loop  
There are two different modes of operation for a Local Loop  
depending on the status of the units at the time that the Local Loop  
is initiated. If the units are not in linked (NS LED on) and the Local  
Loop is initiated, either by the front panel switch or the DTE inter-  
face, the unit will enter mode 1. If the units are linked, NS LED off,  
then the unit will enter a mode 2 Local Loop.  
A Mode 1 Local Loop is shown in Figure 12. When the Local Loop  
is initiated, either by the front panel switch or the DTE interface, the  
loop will be activated within the local Processor.The data present  
at the local DTE interface will be looped back to the local DTE by  
the Loop Control block within the Processor. Any data present on  
21  
 
 
the line or at the far end DTE interface is invalid.The remote unit  
will remain in the StartUP mode, NS LED on, DSL Link LED stays  
off, until the local unit is taken out of the Local Loop mode. After the  
Local Loop is deselected, the units will both be in StartUP mode  
and the link will be established.  
A mode 2 Local Loop is shown in Figure 13. When the Local Loop  
is initiated, either by the front panel switch or the DTE interface, two  
separate loop paths will be started. In the first path, data presented  
to the local DTE interface will be looped back to the local DTE  
within the framer. In the second path, data presented at the far end  
DTE will be transmitted to the local DTE and then looped back  
within the local DTE Loop Control block with the Processor. After  
the Local Loop is deselected, the units will be placed back into  
DataMode and the normal data paths will be re-established.  
Pattern  
Gen/Det  
Pattern  
Gen/Det  
Loop  
Control  
Loop  
Control  
Framer  
Framer  
Line  
Processor  
Processor  
Figure 14. Block Diagram Local Loop Mode 1 with 511/511E  
Pattern  
Gen/Det  
Pattern  
Gen/Det  
Loop Control  
Loop Control  
Framer  
Framer  
Line  
Processor  
Processor  
Figure 15. Block Diagram Local Loop Mode 2 with 511/511E  
Local Loop with 511/511E  
When the unit is placed into a Mode 1. Local Loop and the 511/  
511E pattern generator is activated, the local pattern generator  
begins sending out a 511/511E pattern to the Loop Control block.  
The Loop Control block will loop this data back to the 511/511E  
pattern detector block, which will evaluate the data for errors.  
Because the 511/511E pattern generator is contained within the  
Processor the data is unframed so the framer will begin seeing  
unframed packets.The framer receives this unframed data and  
can not distinguish this information from a line disconnection (this  
would cause the units' Restart procedure to start). What we have  
done to allow this mode to work is to add time outs for the pattern  
generators. When the 511/511E is initiated, the line restart proce-  
22  
 
dure is changed to one minute.The 511/511E pattern will timeout  
after 45 seconds. So if the 511/511E is turned on during a local  
loop, the restart procedure is set to one minute, but the 511/511E  
pattern will time out after 45 seconds, allowing the framer to begin  
seeing framed packets (and not restart the box).  
After the 511/511E pattern times out, the ER LED will begin flash-  
ing. It will remain this way until the pattern generator switch is  
turned off. Note that the data at the local DTE and the remote DTE  
are not valid. Because the data is unframed there is no way for the  
framer to send this data out to the DTE.This is an important dis-  
tinction because other Patton units will send out the 511 pattern.  
When the unit is placed into a Mode 2 Local Loop, the 511/511E  
pattern generator on the local unit is unavailable for transmission.  
Figure 15 on page 22 displays the 511/511E pattern generator,  
showing that data path connections are not available.The 511/  
511E pattern generator is still available on the remote unit. For  
more information on the proper operation of this pattern generator  
please refer to the "Remote Digital Loop with 511/511E" section.  
Pattern  
Gen/Det  
Pattern  
Gen/Det  
Loop  
Control  
Loop  
Control  
Framer  
Framer  
Line  
Processor  
Processor  
Figure 16. Block Diagram Remote Loop  
Remote Digital Loop  
The Remote Loop uses the EOC channel (an out-of-band signal-  
ing channel) to establish the remote link. Upon the RDL switch  
being thrown or DTE initiation, a RDL_ON Request signal is sent  
to the remote unit.The Remote unit then responds with an RDL  
Acknowledge command and the link is established. Data origi-  
nates at the local DTE and is looped at the Remote PROCESSOR  
back to the Local DTE. Note that the data is also passed through to  
the Remote DTE and is not squelched.When a Remote unit enters  
RDL, it changes its' Restart timeout to one minute (the reason will  
be explain in the RDL with 511/511E section). If the line is discon-  
nected, the local unit will Restart (NS led activated) after 4–6 sec-  
onds, but the Remote unit will wait for one minute before it  
Restarts. Note that the transmit data at the Remote DTE is  
ignored. When the switch is thrown or the DTE removes the RDL  
request, the local unit will transmit an RDL_OFF Request to the  
Remote unit.The local unit will keep its TM led active until this  
request has been completely sent out. If the switch is thrown again  
23  
 
before the completion of the termination phase the switch will be  
ignored until it is placed back into the normal position.  
Pattern  
Gen/Det  
Loop  
Control  
Loop  
Control  
Framer  
Pattern  
Gen/Det  
Framer  
Line  
Processor  
Processor  
Figure 17. Block Remote Loop with 511/511E  
Remote Digital Loop with 511/511E  
The Remote Digital Loop with 511/511E is shown above. After  
RDL is established the Remote units' Restart Timer is set to one  
minute.This has been done because when the 511/511E genera-  
tor is started on the local unit, the Remote framer begins seeing  
unframed packets.The Remote unit can not distinguish the 511/  
511E pattern from the line being disconnected so the Restart  
Timer has been lengthened to allow the pattern generator to func-  
tion. Once the 511/511E test is started, the Local unit changes its'  
Restart Timer to one minute.The pattern originates within the Pro-  
cessor and is sent to the Remote unit. It is then looped back to the  
Local unit where it is evaluated for errors. After 45 seconds, the  
Pattern Generator will timeout and stops sending the pattern.The  
ER led will begin blinking until the user turns off the 511/511E  
switch.  
Loop  
Control  
Loop  
Control  
Framer  
Pattern  
Gen/Det  
Pattern  
Gen/Det  
Framer  
Line  
Processor  
Processor  
Figure 18. Block Diagram DataMode with 511/511E  
Data Mode with 511/511E Pattern Generators  
When the units enter DataMode it is possible to turn on the 511/  
511E pattern generators on both ends of the link. Once a 511/  
511E pattern is selected on one end of the link, the pattern genera-  
tor will begin transmitting unframed 511/511E through the line to  
the Remote end. A possible problem with this test can occur due to  
the Restart procedure. Once the Local 511/511E is turned on, the  
Remote unit begins receiving an unframed 511 pattern. If the  
Remote unit does not turn on the 511/511E-pattern generator  
within 4 seconds, the Remote unit will Restart and enter the Start-  
24  
 
Up mode. Note that once the 511/511E-pattern generator is  
started the Restart timer is changed to one minute (only on the unit  
which has the pattern enabled). If both units enable the 511/511E  
pattern within 4 seconds of each other, both units will be transmit-  
ting and receiving the 511/511E pattern. Both framers are now  
receiving unframed data and will restart after one minute.The 511/  
511E pattern generators will TimeOut after 45 seconds re-enabling  
the normal data path.The ER led will begin flashing until the user  
terminates the test.  
Using the V.52 (BER) Test Pattern Generator  
To use the V.52 BER tests in conjunction with the Remote Digital Loop-  
back tests (or with Local Line Loopback tests), follow these instructions:  
1. Locate the “511/511E” toggle switch on the front panel of the 1088  
and move it DOWN. This activates the V.52 BER test mode and  
transmits a “511” test pattern into the loop. If any errors are present,  
the local modem’s red “ER” LED will blink sporadically.  
2. If the above test indicates no errors are present, move the V.52 tog-  
gle switch UP, activating the “511/E” test with errors present. If the  
test is working properly, the local modem's red “ER” LED will blink.  
A successful “511/E” test will confirm that the link is in place, and  
that the Model 1088’s built-in “511” generator and detector are work-  
ing properly.  
Note The above V.52 BER tests can be used independently of the  
Remote Digital Loopback tests. This requires two operators: (1)  
to initiate and monitor the tests at the local Model 1088, and (2)  
to do the same at the remote Model 1088. In this case, the test  
pattern sent by each Model 1088 will not be looped back, but will  
be transmitted down the line to the other Model 1088. While one  
operator initiates test, the other monitors for errors.  
25  
 
 
APPENDIX A  
SPECIFICATIONS  
A.1 CLOCKING MODES  
Network (G.703)  
A.2 DTE RATE  
All 64k steps from 64 to 2048 kbps  
A.3 DIAGNOSTICS  
V52 compliant (511/511E) pattern generator and detector with error  
injection mode. Remote Loopback (toward DSL line) and local loopback  
(toward G.703 network) control by a single front panel switch  
A.4 LED STATUS  
The following LEDs are displayed on the front panel:  
• DSL Link (Green Active) - DSL Link Active  
• E1 Link (Green Active) - Valid G.703/G.704 connection  
• LOS (Red Active) - E1 loss of framing  
• NS (Red Active) - No signal DSL Link  
• ER (Flashing Red) - CRC error during nor-mal operation, bit error dur-  
ing pattern gen-eration test  
• TM (Active Yellow) - Test Mode Enabled  
A.5 CONFIGURATION  
Externally accessible dip switches or SNMP managed through 1095RC  
A.6 POWER  
5 VDC from external desk top power supply, 90-260VAC, 50-60 Hz (Uni-  
versal Input), 10W or -48 VDC  
A.7 COMPLIANCE  
FCC Part 15, CE, CTR12, CRTR13 Transmission Line: Single Twisted  
Pair  
26  
 
               
A.8 LINE CODING  
CAP (Carrierless Amplitude and Phase Modulation  
A.9 LINE RATES (DSL LINE)  
144, 272, 400, 528, 784, 1040, 1552, 2064, Line Interface: Transformer  
coupled, 1500 VAC isolation  
A.10 MDSL PHYSICAL  
Connection: RJ-48C, 2 wire, polarity insensitive pins 4 and 5  
A.11 G.703/G.704 SPECIFIC  
Interface: Female Dual Coaxial 75 ohm or Female RJ-48C 120 ohm  
A.12 LINE RATE  
2.048 Mbps  
A.13 LINE CODING  
AMI or HDB3 (selectable) HDB3 is the default  
A.14 LINE FRAMING  
G.703 (unframed) or G.704/G.732 (framed)  
A.15 ISOLATION  
1500 Vrms  
A.16 PHYSICAL CONNECTION  
• pin 1 Rx Data +  
• pin 2 Rx Data -  
• pin 4 Tx Data -  
• pin 5 Tx Data -  
• pins 3, 6, 7, 8 no connection  
27  
 
                 
APPENDIX B  
FACTORY REPLACEMENT PARTS AND ACCESSORIES  
Model #  
Description  
1088/K  
080551  
080552  
G.703 mDSL Rocket (CAP)  
120V Power Supply  
230V Power Supply  
48V-PSM  
DC Power Supply Module  
08055DCUI  
100–240VAC (+5V ±5% reg. DC/2A)  
Universal Input Adapter  
0805EUR  
0805UK  
0805US  
0805AUS  
0805DEN  
0805FR  
European Power Cord CEE 7 (“A”)  
United Kingdom Power Cord (“D”)  
American Power Cord (“K”)  
Australia/New Zealand Power Cord (“C”)  
Denmark Power Cord (“E”)  
France/Belgium Power Cord (“F”)  
India Power Cord (“G”)  
0805IN  
0805IS  
Israel Power Cord (“H”)  
0805JAP  
0805SW  
07M1088/K  
Japan Power Cord (“J”)  
Switzerland Power Cord (“L)  
User Manual  
28  
 
 
APPENDIX C  
TRANSMISSION DISTANCE CHART  
29  
 
 
APPENDIX D  
MODEL 1088/K LED DESCRIPTIONS  
-----------------------------------------------------------------------  
E1/FE1 LOS DSL Link NS ER TM  
E1/FE1 LOS DSL Link NS ER TM  
-----------------------------------------------------------------------  
Power ON G*  
DSL Link G*  
Link Brk G*  
Brk+ 10s G*  
R*  
R*  
R*  
R*  
R*  
R*  
off  
G*  
ON off off  
off off off  
off off off  
ON off off  
off off ON  
off off ON  
G*  
G*  
G*  
G*  
G*  
G*  
R*  
R*  
R*  
R*  
R*  
R*  
off  
G
ON off off  
off off off  
off off off  
ON off off  
off off ON  
off off ON  
off  
off  
G*  
off  
off  
G
RDL  
G*  
G*  
RDL+511  
off  
off  
-----------------------------------------------------------------------  
With DTE Connected With DTE Connected  
-----------------------------------------------------------------------  
Mark  
Space  
Data  
G*  
G*  
G*  
R*  
R*  
R*  
G*  
G*  
G*  
off off off  
off off off  
off off off  
G*  
G*  
G*  
R*  
R*  
R*  
G
G
G
off off off  
off off off  
off off off  
Link Brk = DSL Link Broken  
Brk+10s = 10 Seconds following Link Break  
G=GREEN  
O=ORANGE  
ON= ON  
off= OFF  
G*=Green if a valid 10Base-T connection is detected.  
R*=Red if a loss of sync on the E1 signal is detected.  
30  
 
 
Notes  
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Notes  
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Copyright © 2006  
Patton Electronics Company  
All Rights Reserved.  
32  
 

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