[c-nsp] Odd MGCP issue with Caller-id

[Matlock, Kenneth L]

We have a Call Manager 4.1 setup, and are using a few 2851's with FXS
cards (VIC-4FXS/DID=) as gateways using MGCP for Fax lines.

 

Everything is (and has) been working fine, but we have been tracing down
a problem where *some* destinations could not call these extensions
(there wasn't a rhyme or reason we could see at first).

 

What we finally found, was that is was based off the length of the
*calling* name. If it was 15 characters or less in call manager, it
would work, but 16+ would not (they'd get a reorder tone).

 

The relevant debug logs are as follows:

 

Sep  4 09:46:38 MDT:
//-1/7EF7044C8022/MGCP|aaln/S0/SU2/0|-1|-1/<VOICE>/gen_caller_id(9324):[
lvl=1]mode == VALIDATE cid =<09/04/09/46,24671,Ken Matlock Test Test
Test>

Sep  4 09:46:38 MDT:
//-1/xxxxxxxxxxxx/MGCP/mgcp_parse_cid_str(5889):[lvl=2]time=<09/04/09/46
> num=<24671> name=<Ken Matlock Test Test Test>

Sep  4 09:46:38 MDT:
//-1/7EF7044C8022/MGCP|aaln/S0/SU2/0|-1|-1/<VOICE>/gen_caller_id(9337):[
lvl=0]-- Country code = US

Sep  4 09:46:38 MDT:
//-1/7EF7044C8022/MGCP|aaln/S0/SU2/0|-1|-1/<VOICE>/gen_caller_id(9362):[
lvl=1]-- Caller Id type = 1

Sep  4 09:46:38 MDT:
//-1/7EF7044C8022/MGCP|aaln/S0/SU2/0|-1|-1/<VOICE>/gen_caller_id(9424):[
lvl=0]-- returns code = 54

Sep  4 09:46:38 MDT:
//-1/7EF7044C8022/MGCP|aaln/S0/SU2/0|-1|-1/<VOICE>/process_start_signal(
4062):[lvl=2]process_start_signal(): FAIL with rc: 54, need to reject
the whole list

 

And

 

Sep  4 09:46:38 MDT: MGCP Packet sent to 172.18.164.136:2427---> 510
100502 unsupported caller id length <---

 

I've done numerous searches on those errors, and checked the bug toolkit
for both IOS version we've tried (12.4(20)T and 12.4(21) ) and no luck.

 

Tried the 'caller-id block' on the port (but since it's not incoming on
the FXS port I didn't think it'd help anyway). 

 

While we CAN go into Callmanager and shorten all the stations with 16+
character display names, I'd hate to have to go to that trouble if I can
help it. Is there a way to increase that limit, or is that a hard-set in
either the FXS cards, or MGCP?

 

Ken Matlock
Network Analyst
(303) 467-4671
matlockk at exempla.org