Fixed issue with no-way voice across QSIG E1 trunk and 2800 Series router

Very strange this one.

We have multiple customers running SP Services 12.4-15T12 and we appeared to hit an intermittent bug with a particular customer. This customer has a 2800 series router with 2x E1 links to a PBX using QSIG. The symptoms are that occasionally you get no-way voice across the trunk to the PBX, when the call originates from either direction. I've been running 12.4-24T3 for a few days now and the issue doesn't appear to have occurred again.

Here is the response from TAC:

It can happen on any gateway that is using c5510 DSPs (PVDM2-x where x=
8 or 16 or 32 or 64) using IOS 124-15T10 through 124-15T13 (dsp version
9.4.9 through 9.4.12).

My suggestion would be to keep an eye on it cause the bug does not happen *all* the time, it is a intermittent and random issue where you will start experiencing random one-way or no-way or complete dead air calls. You can open a TAC case at that point and get the DSP firmware from the fix.

So to clarify:
Once the issue is encountered and you want to stay on 124-15T train until 124-15T14 is released on CCO, you will have to:

load 1240-15T13 IOS image PLUS also contact TAC and get the DSP firmware version (which will eventually be bundled in 124-15T14). The bug id you can reference is CSCtf25886.

Been a jettin'

Howdo folks,

Not many posts as of recent as i’ve been so so busy with customer projects. Managed to get everything installed up in Scotland (300 user phone system) and also off to Nottingham to Demonstrate integration between a DPNSS Siemens/Octel PBX system with a Westell converter and Cisco CallManager. Which was nice…

Other than that hoorah the sun is shining, it’s almost the weekend, and we won at football (15-14, close match!). Oh and there’s talk of a company car soon again which’d be rather nice.
Off to Northampton again tomorrow, then a nice relaxing weekend doing some studying.