WIC-1DSU-T1 Back to Back

[pg2190]

I have tried for two days to get my two 2621 routers connected back to back each with WIC-1DSU-T1 cards. I have made two T1 crossover cables in case I had the first one wrong. I have read everything I could find on it at cisco.com and various other websites. I have tried every combination of statments on the serial interfaces. Both WIC-1DSU-T1 cards have the amber LED lit on AL and one of them shows a green LED on CD. The green LED on CD changes to the other WIC-1DSU-T1 when I reverse the T1 crossover. Please help me if you have seen this problem. Thanks in advance.

 

[rudeboy]

Make sure your T1 crossover is correct:
1-----4
2-----5

I am gussing you did a show ver and/or show diag to verify that the cards are reckognized ok. What alarms are detected when you do a show serv (short for show service-module)?

 

[pg2190]

I ran those commands and here is the result;
Router 1
WIC Slot 0:
FT1 BT8360
Hardware revision 1.3 Board revision B0
Serial number 23498537 Part number 800-03279-04
Test history 0x0 RMA number 00-00-00
Connector type Wan Module
EEPROM format version 2
EEPROM contents (hex):
0x20: 02 11 01 03 01 66 8F 29 50 0C CF 04 00 00 00 00
0x30: 58 00 00 00 11 11 03 01 FF FF FF FF FF FF FF FF

Router 2
WIC Slot 0:
FT1 WAN daughter card
Hardware revision 1.3 Board revision C0
Serial number 20119029 Part number 800-03279-03
Test history 0x0 RMA number 00-00-00
Connector type Wan Module
EEPROM format version 2
EEPROM contents (hex):
0x20: 02 11 01 03 01 32 FD F5 50 0C CF 03 00 00 00 00
0x30: 60 00 00 00 11 07 05 01 FF FF FF FF FF FF FF FF

Router 1
SHOW SERVICE-MODULE SERIAL 0/0
Module type is T1/fractional
Hardware revision is 0.88, Software revision is 20040131-0.3,
Image checksum is 0x873E3B7E, Protocol revision is 0.1
Transmitter is sending remote alarm.
Receiver has loss of signal, loss of frame,
Framing is ESF, Line Code is B8ZS, Current clock source is line,
Fraction has 24 timeslots (64 Kbits/sec each), Net bandwidth is 1536 Kbits/sec.
Last module self-test (done at startup): Passed
Last clearing of alarm counters 05:48:48
loss of signal : 1, current duration 05:48:39
loss of frame : 1, current duration 05:48:39
AIS alarm : 0,
Remote alarm : 0,
Module access errors : 0,
Total Data (last 23 15 minute intervals):
445288 Line Code Violations, 0 Path Code Violations
5629 Slip Secs, 20700 Fr Loss Secs, 16359 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 20700 Unavail Secs
Data in current interval (194 seconds elapsed):
43019 Line Code Violations, 0 Path Code Violations
63 Slip Secs, 194 Fr Loss Secs, 194 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 194 Unavail Secs

Router 2
Module type is T1/fractional
Hardware revision is 0.96, Software revision is 0.2,
Image checksum is 0xED22BEC5, Protocol revision is 0.1
Transmitter is sending remote alarm.
Receiver has loss of frame, AIS alarm,
Framing is ESF, Line Code is B8ZS, Current clock source is line,
Fraction has 24 timeslots (64 Kbits/sec each), Net bandwidth is 1536 Kbits/sec.
Last module self-test (done at startup): Passed
Last clearing of alarm counters 07:33:12
loss of signal : 0,
loss of frame : 1, current duration 07:33:04
AIS alarm : 1, current duration 07:33:04
Remote alarm : 0,
Module access errors : 0,
Total Data (last 30 15 minute intervals):
5356 Line Code Violations, 510 Path Code Violations
2839 Slip Secs, 26458 Fr Loss Secs, 17487 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 5 Severely Err Secs, 26457 Unavail Secs
Data in current interval (143 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 143 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 143 Unavail Secs

I hope this gives a clue. I ran these commands with the interfaces shutdown.

Thanks,

 

[VoIPGuyNSC]

Neither of the interfaces are providing clocking. You should use the 'clock rate' command on one of the routers.

John Lever
Telecommunications
Richland School District Two

 

[VoIPGuyNSC]

I should add that anytime your line is "slipping", as indicated by the 'slip secs' output, its indicating a problem with clocking.

John Lever
Telecommunications
Richland School District Two

 

[rudeboy]

Try using this command on one of the routers to set the timing to internal:

interface Serial0
service-module t1 clock source internal

Leave the other one at line.

 

[artesian2000]

I believe by default the clock source is internal. I would run the above command on one and this on the other to be sure
interface Serial0
service-module t1 clock source line

 

[plshlpme]

^^
since both serial cards are currently showing
"Current clock source is line"
i would assume the default is line.

 

[SYQUEST]

From your printout it shows that neither router is receiving any T1 signal. Check the continuity of your cable per previous posts. Until the WIC gets an acceptable RX you will have alarms!

Hope this helps!

....JIM....

 

[voltron1011]

Have you performed a loopback check on each T-1 interface to verify that they are working individually?

 

[SYQUEST]

I just realized on the post with the modular plug wiring is only half! It takes 2-pairs to make it work...

PLUG 1 PLUG 2
1 ----------4
2 ----------5
4 ----------1
5 ----------2

Or see thread557-1235353 for same.

....JIM....

 

[rudeboy]

I meant to illustrate "cross pins 1,2 with pins 4,5" on both sides. SYNQUEST is correct with his diagram.

 

[drae73]

I agree with many of the posts, two things are going on here.....

1) you definitely need to verify your T1 cross over, you should be using pins 1,2,4,5 and have them straight through on one end and flopped on the other end (cross over of course).

2)By default the clock source is line, set one of the routers clock source to internal as well as set the clock rate command.

Thanks,


-Andrae