[Asterisk-Users] Cisco 7960 and short delay before voice starts after ring.

John Fraizer tvo at enterzone.net
Wed Mar 10 14:01:24 MST 2004

Steve Creel wrote:
> Can you test this with an extension that goes into VoiceMailMain().  My
> 7960 and 7960G phones both get the first couple letters of "Commedian
> Mail" cut off (usually "...median Mail").
> Just trying to quantify the delay we're talking about...
> Steve

exten => 8500,1,Answer
exten => 8500,2,Ringing
exten => 8500,3,Wait,1
exten => 8500,4,VoicemailMain(${CALLERIDNUM})
exten => 8500,5,Hangup

Works fine.

If you're talking about the "comedian mail" cutting off at the beginning 
without having the answer,ringing,wait in there, I think you're being a bit 
picky, perhaps even anal about the timing there.

It boils down to the fact that voicemailmain doesn't wait to see the session 
completely up before playing the "comedian mail" prompt.  This is indeed an 
Asterisk issue - one that is very easy to remedy by setting your voicemail 
extension as I have mine.

For what it's worth, my Grandstream phone has the same exact behavior 
without the answer,ringing,wait.

What exactly happens in that first 5ms of call setup that is so crucial? 
I've seen PSTN switches with longer delays in setup/teardown.


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