E1 (DID / DOD link) - Holdover

Unanswered Question
Feb 6th, 2010

Could anyone help me regarding our VOIP..

We are experiencing unstable call connection in our gateway. We have E1 link (DID/ DOD) with 30 channels (17 Incoming & 13 Outgoing).

During the day will experience (4 to 5 times) call drop out, and once we check the gateway, show voice port summary (below is the output).

We need to SHUT and NO SHUT the channel-group interface to change the state to IDLE otherwise no incoming or outgoing calls.

busy-out status.JPG

********** Show version **************

BM28VG#sh ver
Cisco IOS Software, 2800 Software (C2800NM-ADVIPSERVICESK9-M), Version 12.4(22)T1, RELEASE SOFTWARE (fc5)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Thu 26-Feb-09 19:47 by prod_rel_team

ROM: System Bootstrap, Version 12.4(1r) [hqluong 1r], RELEASE SOFTWARE (fc1)

BM28VG uptime is 1 hour, 35 minutes
System returned to ROM by reload at 13:49:32 GMT Sat Feb 6 2010
System restarted at 13:51:13 GMT Sat Feb 6 2010
System image file is "flash:c2800nm-advipservicesk9-mz.124-22.T1.bin"


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[email protected] 2821 (revision 53.50) with 245760K/16384K bytes of memory.
Processor board ID FCZ104372H4
2 Gigabit Ethernet interfaces
1 Channelized/Clear E1/PRI port
1 Virtual Private Network (VPN) Module
8 Voice FXO interfaces
DRAM configuration is 64 bits wide with parity enabled.
239K bytes of non-volatile configuration memory.
62720K bytes of ATA CompactFlash (Read/Write)

If

Cisco

Configuration register is 0x2102

**********************************

********* Show run *********

no aaa new-model
clock timezone GMT 3
clock summer-time EDT recurring
network-clock-participate wic 0
network-clock-select 1 E1 0/0/0

controller E1 0/0/0
framing NO-CRC4
line-termination 75-ohm
ds0-group 0 timeslots 1-15,17-18 type r2-digital r2-compelled ani
ds0-group 1 timeslots 19-31 type r2-digital r2-compelled ani
cas-custom 0
  country saudiarabia use-defaults
cas-custom 1
  country saudiarabia use-defaults

*****************************************

*******Show Controller E1 0/0/0 ********

link up.JPG

*************************************************************

****** Show Network-clocks*********************

network-clock.JPG

Note:

We already open several Trouble ticket with our ISP but still there are insisting that the problem is our in-house wirings.

Currently we are using 25 pairs STP armored cable (60 to 70 meters long), and 3 meters CAT6 from patch to Router.

Our local cisco vendor already provided new Cisco 2800 for our gateway.

I have this problem too.
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Paolo Bevilacqua Sat, 02/06/2010 - 05:17

Send "show controllers E1". Do not user graphic images.

Note, ethernet cable has different pairing than E1. You MUST respect pairing hence using a special adapter cable.

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