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New Member

network module test

i have a 3745 with a nm-hdv network module with a vwic1mft-t1 card installed and i cant the new t-1 to come up - i get int up line protocol down. i replaced the module and the controllers with new equipment and still cant get the circuit to come up. the telco has reprovisioned the line and replaced the smartjack - still no luck. so my question is how can i test the interface between the network module and the router? i need to make sure it's not my hardware before i press the telco anymore.

thanks in advance.


Re: network module test

If you have a up/down condition it is more than likely not a hardware issue in your router.

Normally you start with the provider giving you a loop from the smart jack toward your equipment. If you can't see that then you have a cable or module issue.

Build a loop plug by with 2 short wires and connecting pin 1 to pin 4 and pin 2 to pin 5. Put this directly in the router. You should get the interface up/looped. If not you built the plug wrong or you have a bad router interface.

You can put the loop plug on the end of the cable just before it plugs into the smart jack. If you get up/looped you know it is not your problem and it must be the smart jack or the provider didn't give you a proper loop when you tested this.

New Member

Re: network module test

i put the circuit in a working controller and the interface came online. i could have a config issue but i dont think i do.


Applique type is Channelized T1

Cablelength is long gain36 0db

No alarms detected.

alarm-trigger is not set

Version info Firmware: 20040713, FPGA: 15, spm_count = 0

Framing is ESF, Line Code is B8ZS, Clock Source is Line.

CRC Threshold is 320. Reported from firmware is 320.

Data in current interval (49 seconds elapsed):

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Total Data (last 24 hours)

5089 Line Code Violations, 10259 Path Code Violations,

1 Slip Secs, 0 Fr Loss Secs, 3 Line Err Secs, 0 Degraded Mins,

0 Errored Secs, 0 Bursty Err Secs, 7 Severely Err Secs, 204 Unavail Sec


controller T1 1/0

framing esf

linecode b8zs

channel-group 0 timeslots 24 speed 64


Serial1/0:0 is up, line protocol is down

Hardware is DSX1

Description: NewT-1 to CordSummit

Interface is unnumbered. Using address of FastEthernet0/0.10 (

MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation HDLC, loopback not set

Keepalive set (10 sec)

Last input never, output 00:00:08, output hang never

Last clearing of "show interface" counters never

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: Class-based queueing

Output queue: 0/1000/64/0 (size/max total/threshold/drops)

Conversations 0/1/256 (active/max active/max total)

Reserved Conversations 1/1 (allocated/max allocated)

Available Bandwidth 350 kilobits/sec

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

0 packets input, 0 bytes, 0 no buffer

Received 0 broadcasts, 0 runts, 0 giants, 0 throttles

0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort

60757 packets output, 1599252 bytes, 0 underruns

0 output errors, 0 collisions, 0 interface resets

0 output buffer failures, 0 output buffers swapped out

7 carrier transitions

Any ideas?


Re: network module test

One thing to look at, how far away is the smart jack from the router? You may need to shorten the cable length. possibly the level is too high. When the cable length is set to long the output Db level is increased because it is anticipating a long cable length. lower the Db level by shortening the cable length..It can't hurt....

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