[asterisk-users] Long call setup times on SIP to zaptel calls

[Yuan LIU]

>From: "Jordan Novak" <jnovak at logisticshealth.com>
>Date: Thu, 15 Feb 2007 13:45:39 -0600
>
>I have had a lot of complaints about the time it takes to setup a call.
>I have timed it and it is almost five seconds before it even starts
>ringing. The SIP device sends the request almost instantly but the
>channel is taking a long time to pickup and dial. It wouldn't be so bad
>but they hear nothing. I would like to provide ringback before the
>zaptel actually starts ringing the channel. Has anybody done this, it
>seems like it would be a zaptel option.
>
>Jordan Novak

A local ring back is built in Dial()'s r option.  The problem with this is 
that the caller is never going to hear the real ring back.  I haven't 
figured out a good strategy to deal with this caveat.  Suggestions?

Yuan Liu