Call volume dropping when using VM Pro call recording

[dudspog]

Hi,
This is a bit of an odd one.
It's taken us a while to work out the situation.
It's an IP500 V2 6.1.12, all VOIP phones 1600 series.
The trunks are ISDN 30's (x2).
G711 now being used, but was the same on G729.


When we use the VM pro to record incoming external calls, we get a drop in volume of the far end.
It's only when there is more than about 5 calls being recorded.
Only seems to effect the users being recorded.
It's not a very busy switch, never more than 15 calls on the go.


There's 20 VM channels, never seen congestion.
64 VCM channels.
There's a small amount of packet loss 3 - 9%, but this doesn't seem to change when recording or not.
The calls are not choppy or dropping out, they just go quiet. Sometimes fading in and out.


Any ideas??
Thanks as always...

 

[TexasBear]

Are the extensions on the LAN or are they remote? I wouldn't consider any level of packet loss to be acceptable on the local in-building LAN. It's probably not connected to the volume loss, but I would want to resolve that.

Does the volume drop present immediately when recording begins, or does the volume waver?

 

[tlpeter]

Try playing with this NoUser source number:

CONFERENCE_DSP_TX_GAIN=-2

It needs a reboot!


BAZINGA!

I'm not insane, my mother had me tested!

 

[dudspog]

Hi guys,
Thanks for the replies..

The phones are all on the same LAN, very small network really, two HP Procurve switches and using the dual port on the phone for PC's.
Voice and data split on seperate VLAN's.
Volume drops off as more calls get recorded, doesn't waver, just gets quieter the more users are on calls.
I've seen the users staring off with full volume on the handsets and having to turn it back down if other users come off calls.


Ah... we were wondering about the conference side of things....
I'm going back to site today, so I'll grill the IT guy about his switch setup and put that string into the NoUser source number.

Thanks again.

 

[tlpeter]

VMpro uses the conference chip in the IPO to do call recording.
It could be that the chip is broken but that is why i suggest to use the NoUser source number as you can change the gain a bit.
But this could also raise it for the good calls so bring a spare IPO with you.

BAZINGA!

I'm not insane, my mother had me tested!

 

[hairlessupportmonkey]

We had this on a site and restarting voicemail would fix it for a while. I think we put them on the latest build of 7.0.xx and it went away.

If its only a small site, upgrade them to 8.1

ACSS - SME
General Geek

 

[dudspog]

Thanks gents, Hi Ho, it's off to work I go.

 

[smokinjoe2938]

tlpeter may be right, sounds like the conference chip may be on it's way out, already had this happen to me

acss sme acis sme acss cm 5.2.1 acss cm and cmm acss aura messaging.

 

[dudspog]

hmmmn, stuck the NoUser sournce number bit in yesterday, monitoring today.
I have my doubts about it though... I reckon it will just push up the volume of the conference for all the calls, good and bad, not just adjust the bad.