Crosstalk: call originates from 11xx/SIP set calling through TDM/PRI any phone SETs

[wgocip]

Hi Everyone,

Hi Everyone,
We are facing a weird issue: When a call is originated from a SIP set 1140/1120 to external phone set via PRI/PSTN randmonly call get crosstalk/jumpped to another call;
Or sometimes during the call, the phone goes on hold without pressing any key.
The calling party can hear someone else's conversation; (and some times the called party feels like it was put on hold)

We've checked both SS_common.log on the SLUG and MCS32s cards logs as well as the CS1000s errors but we can't find any errors;
All the MCS32s card seem to negiotiate the right codec and their hourly stats shows 0 errors

Any idea on what could be the problem and how can efficiently troubleshoot the problem as it hard to catch a live one.
Note:We didn't notice any crossTalk betwen 1140/1120 sets.


Call Flow:

Avaya SIP SET 1120/1140 (ver 4.3) <-- SIP --> Avaya-SLG <--> CS1000M (releasee 7.5) <-- PRI --> ANY phones SET
<--------------------------- IP ------------------------------><------------------------------------------------ TDM --------------------------------->

 

[Tacosoup]

Are all your patches up to date? Try doing the MIRCC and see whats defective/obsolete

** Proofread carefully to see if you any words out.

 

[wgocip]

Hi Tacosoup

At one point yes we've loaded all latest patches that were included in the 7.5 service pack 24 and another delta patch that was suggested by Avaya;
Did you see any similar case with one of your customers?
Thank you.

 

[golfdoctor]

Hi wgocip,

Couple of ideas - probably left field

How many phones in question 1-3-200 ??
Did the system always act this way or was there a trigger (upgrade/new settings/whatever)??
Try a 2002p2 or 2004p2 phone - is issue the same ??
Is 1120/1140 firmware latest and greatest (0624C8V/0625C8V I believe)
Hard select your codecs on all media cards to G711 only
and last but not least - are the devices being called on the PSTN side SIP or everything under the sun (cell,analogue)

Only a thought

TGD

 

[wgocip]

Hi golfdoctor,

1- we are talking about 2000 phones;
2- We start to notice this when we are migrating more users from analog/digital phones to Avaya 1140/1120 sets.
3- The 1120/1140's software version is SIP 4.3 (I'm currently testing 4.4 sp2)
4- All media cards (MC32S) are configured with G711 a-law
5- No 1140/1120 iniatiate the call to pstn.

Call Flow:

Avaya SIP SET 1120/1140 (ver 4.3) <-- SIP --> Avaya-SLG <--> CS1000M (releasee 7.5) <-- PRI --> ANY phones SET
<--------------------------- IP ------------------------------><------------------------------------------------ TDM --------------------------------->

 

[golfdoctor]

Hi wgocip,

I am not going to be much of a resource however if I had to guess it sounds to me its the codecs or your PSTN trunks/carrier. I don't use SIP phones/SIP trunking on any of my systems so I won't be much help.

Couple of things;

TDM/PRI card - I assumed this is a traditional digital PRI/PRA setup (ie not sip trunking)

Not sure about para 4 response - are all MC32S cards configured for G711 only ? - meaning no other codec is enabled or allowed. Never used MC32s but I assume you can force the card(s) to use only the G711 and T38 codec (fax)- those codecs are on by default but the other codecs come into play if they have been enabled. If you are in North America maybe mu-law vs a-law is the configuration setup to use however I'm not sure if this would cause any of the issues described.

Do you have any 1120/1140 IP phones that are non SIP or even digital sets and do they experience the same type of issues ?

Only a thought ..


TGD

 

[wgocip]

HI,

It's hapenning with the SIP 1140/1120 phone only; That's why I'm trying to focus on the MC32s cards.