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New Member

Incoming Call From PSTN first 2-3 sec with no audio

CCM Cluster 4.1.3 sr2 with 5 remote branch PSTN connected using H323 Gateway.

Many times ISDN incoming calls terminated into an H323 Voice Gateway located into one of 5 remote site are silent for 2-3 seconds after the connect status. The calling can hear the other side that repaat (hello, hello) for 3 second, after that the audio works fine

5 REPLIES
Silver

Re: Incoming Call From PSTN first 2-3 sec with no audio

Try entering this command on the gateway. This would enable the cut-through of voice in both directions when RTP channel is open.

voice rtp send-recv

Regards,

Anup

New Member

Re: Incoming Call From PSTN first 2-3 sec with no audio

I always use this command

Cisco Employee

Re: Incoming Call From PSTN first 2-3 sec with no audio

See if fast start is enabled inbound in callmanager.

The parameter name in Callmanager is:

H323FastStartInbound <

Look under Service Parameters > Call Manager >

Hope this helps

Re: Incoming Call From PSTN first 2-3 sec with no audio

I thought FastStart was Device > Gateway > Incoming > Inbound FastStart...in 4.1(3)SR2..

New Member

Re: Incoming Call From PSTN first 2-3 sec with no audio

I have the same problem but using CM 3.3(3) with 3 cluster, the solution is the same one?

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