VCM Comfort Noise settings

[Mortigan]

I'm having some issues with external calls and the level of background noise. Basically when I'm on external calls there are times when the background noise cuts out and leads the users to think that their calls have dropped. The calls are NOT actually dropping, there seems to be some sort of "white noise" that cuts off while the internal user (me) is speaking. Often times if I stop speaking abruptly the white noise doesn't resume making the call sound like it has dropped.

I've been working with my network provider to see if this is something that they might have control over but I'm also curious about the VCM settings relating to "comfort noise". We do not have this problem on internal calls and I have direct media path enabled so I don't think internal calls are using the VCM. Could these settings have anything to do with the symptoms I've described?

I DO NOT have VOIP Silence Suppression enabled.
I also tried disabling Direct Media Path on 2 extensions and called between them hoping it would use the VCM and possibly confirm that this is the problem. There were no problems on the call but I can't be certain whether or not the VCM was used on that call.

 

[amriddle01]

Well turn it on then, that is what you want to do suppress the silence, this is done by generating white noise/comfort tone

ACS - IP Office Implement

"I'm just off to Hartlepool to buy some exploding trousers

 

[Mortigan]

I thought Silence Suppression makes the phones not send packets during times of silence to save bandwidth? Have I been misinformed yet again by my quality Avaya BP?

 

[amriddle01]

I think that may be right, but have you tried it? It says it's not used on G711 for IP400 and 500's but it can't hurt to try it

ACS - IP Office Implement

"I'm just off to Hartlepool to buy some exploding trousers

 

[Bas1234]

???...from the docs;

VoIP Silence Suppression: Default = Off
When selected, this option will detect periods of silence on any call over the line and will not send any data during those silent periods. This feature is not used on IP lines using G711 between IP400 and IP500 systems.

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It works! Now if only I could remember what I did...
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[CarGoSki]

Don't beat up your BP too quickly and publicly. What amriddle and you BP said are both correct. Think about it.


VoIP Silence Suppression: Default = Off
When selected H.323 phones will not send data if they are silent, this is useful when optimizing data traffic.

 

[TomMills]

are these 16XX phones?

"There's a dog in the New Zealand section

 

[Mortigan]

Tom, the phones are all 46xx and 56xx phones. I'm going to try changing the Nonlinear Processing Mode to "Silence" in the VCM controls to see if it helps at all. If that doesn't help I'll probably change it back to "Adaptive" and try to tweak the Attenuation and Ceiling settings.