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New Member

7960 Phone and VAD

We have a 7960 IP phone using the Skinny Protocol, is there away to turn on/off VAD on the phone. I've seen how you can do it if the phone is running SIP but not skinny. Thanks

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6 REPLIES
fc
New Member

Re: 7960 Phone and VAD

I've seen "Enable VAD" on SIP phones also? What does it do and when should it be enabled or disabled?

F C Wood

fc@wood.org

New Member

Re: 7960 Phone and VAD

VAD is "Voice Activity Detect" which is basicaly the same as Silence Supression. The idea behind it is to reduce RTP traffic when there is no conversation between the parties.

fc
New Member

Re: 7960 Phone and VAD

Since the idea is to reduce RTP traffic, is disabling Voice Activity Detect (VAD) undertaken mostly to free up bandwidth?

F C Wood

fc@wood.org

New Member

Re: 7960 Phone and VAD

when using skinny VAD is controlled from the Callmanager

Blue

Re: 7960 Phone and VAD

To disable VAD on Cisco CallManager, ensure that the following parameters in the CallManager are set to False (F):

SilenceSuppresionSystemWide

SilenceSuppresionWithGateways

New Member

Re: 7960 Phone and VAD

Here is a funny thing. We have a CCM installed, in the main dial-peer of our voice gateway we have VAD disable (no vad) and both parameters: SilenceSuppresionSystemWide

SilenceSuppresionWithGateways

are set to false. Even though, the silence supresion is enable on outgoing calls only, for incoming calls everything is working fine, it only happends for outgoing calls.

Any idea?

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