[cisco-voip] Help US Voice T1 issue

[Samuel Souza]

Hello guys,

 

We are facing a problem in a US customer.

 

The customer is migration from a Nortel PBX to a 2951 router
with a VWIC3 T1 card, and when the AT&T connects the PSTN on the
router  the T1 stays down, but when the AT&T connects on Nortel again
works fine.

 

Below, some tests that we did:

The configuration seems to be ok because we tested in a 2821
router with a VWIC2 card and it works.

We tried to configure the VWIC2 card on the 2951 router and
it works also.

It is not working only when we connect on the VWIC3 card.

We tried also to replace the router and the cards but still
don’t works.

A hard loopback plug allows the VWIC3 T1 to come up fine.

 

Information:

 

Call flow

 

ip phone --> cucm --> MGCP GW ---> Telco

 

Router Model:

CISCO2951/K9

IOS:

c2951-universalk9-mz.SPA.151-4.M6.bin

T1 Card:

WIC Slot 2:

               
VWIC3-2MFT-T1/E1 - 2-Port RJ-48 Multiflex Trunk - T1/E1

 

Configuration:

 

card type t1 0 2

 

network-clock-participate wic 2 

network-clock-select 1 T1 0/2/0

 

isdn switch-type primary-ni

 

controller T1 0/2/0

cablelength long 0db

pri-group timeslots 1-24 service mgcp

!

controller T1 0/2/1

cablelength long 0db

pri-group timeslots 1-24 service mgcp

 

!

interface Serial0/2/0:23

no ip address

encapsulation hdlc

isdn switch-type primary-ni

isdn incoming-voice voice

isdn bind-l3 ccm-manager

no cdp enable

!

interface Serial0/2/1:23

no ip address

encapsulation hdlc

isdn switch-type primary-ni

isdn incoming-voice voice

isdn bind-l3 ccm-manager

no cdp enable

 

voice-port 0/2/0:23

echo-cancel coverage 64

!

voice-port 0/2/1:23

echo-cancel coverage 64

!

Show controllers:

 

T1 0/2/0 is down.

  Applique type is Channelized T1

  Cablelength is long 0db

  Transmitter is sending remote alarm.

  Receiver has loss of signal.

  alarm-trigger is not set

  Soaking time: 3, Clearance time: 10

  AIS State:Clear  LOS State:Failure LOF
State:Failure

  Version info FPGA Rev: 08121917, FPGA Type: PRK4

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

  CRC Threshold is 320. Reported from firmware  is
320.

  Data in current interval (429 seconds elapsed):

     0 Line Code Violations, 0 Path Code
Violations

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

     0 Errored Secs, 0 Bursty Err Secs,
0 Severely Err Secs, 429 Unavail Secs

  Total Data (last 52 15 minute intervals):

     1 Line Code Violations, 0 Path Code
Violations,

     8173 Slip Secs, 0 Fr Loss Secs, 1
Line Err Secs, 0 Degraded Mins,

     0 Errored Secs, 0 Bursty Err Secs,
0 Severely Err Secs, 46800 Unavail Secs

T1 0/2/1 is down.

  Applique type is Channelized T1

  Cablelength is long 0db

  Transmitter is sending remote alarm.

  Receiver has loss of signal.

  alarm-trigger is not set

  Soaking time: 3, Clearance time: 10

  AIS State:Clear  LOS State:Failure LOF
State:Failure

  Version info FPGA Rev: 08121917, FPGA Type: PRK4

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

  CRC Threshold is 320. Reported from firmware  is
320.

  Data in current interval (429 seconds elapsed):

     0 Line Code Violations, 0 Path Code
Violations

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

     0 Errored Secs, 0 Bursty Err Secs,
0 Severely Err Secs, 429 Unavail Secs

  Total Data (last 52 15 minute intervals):

     1 Line Code Violations, 0 Path Code
Violations,

     8629 Slip Secs, 0 Fr Loss Secs, 1
Line Err Secs, 0 Degraded Mins,

     0 Errored Secs, 0 Bursty Err Secs,
0 Severely Err Secs, 46800 Unavail Secs

 

Show interfaces:

Serial0/2/0:0 is down, line protocol is down 

  Hardware is DSX1

  MTU 1500 bytes, BW 64 Kbit/sec, DLY 20000 usec, 

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

  Encapsulation HDLC, crc 16, loopback not set

  Keepalive set (10 sec)

  Last input never, output never, 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: weighted fair

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

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

     Reserved Conversations 0/0
(allocated/max allocated)

     Available Bandwidth 48 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 IP
multicasts)

     0 runts, 0 giants, 0 throttles

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

     0 packets output, 0 bytes, 0
underruns

     0 output errors, 0 collisions, 0
interface resets

     0 unknown protocol drops

     0 output buffer failures, 0 output
buffers swapped out

     0 carrier transitions

 

Serial0/2/1:0 is down, line protocol is down 

  Hardware is DSX1

  MTU 1500 bytes, BW 64 Kbit/sec, DLY 20000 usec, 

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

  Encapsulation HDLC, crc 16, loopback not set

  Keepalive set (10 sec)

  Last input never, output never, 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: weighted fair

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

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

     Reserved Conversations 0/0
(allocated/max allocated)

     Available Bandwidth 48 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 IP
multicasts)

     0 runts, 0 giants, 0 throttles

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

     0 packets output, 0 bytes, 0
underruns

     0 output errors, 0 collisions, 0
interface resets

     0 unknown protocol drops

     0 output buffer failures, 0 output
buffers swapped out

     0 carrier transitions

 

Many thanks!

 

Samuel Souza. 		 	   		  
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