Correct operation of timout parameter for dial application

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On 12/09/2010 08:15 AM, Bruce McAlister wrote:
> I have now logged issue number 0018447 relating to this query.

The real question here is how you define ‘not responding to INVITEs’.
According to the RFC, Asterisk must wait 64*T1 for a response to an
outbound INVITE, which is 32 seconds. If ‘qualify’ is enabled for the
SIP peer and it responds to OPTIONS pings quickly, Asterisk can reduce
the T1 timer value from 500ms down to 100ms, which drops the INVITE
timeout to 6.4 seconds… but it can’t be any shorter than that without
violating the RFC requirements.