[asterisk-users] Send SIP 100 Trying instead of 183 Session Progress

[Remi Quezada]

Hi,

I have a Asterisk that connects to the PSTN via a PRI.   After Asterisk
sends the setup message it immediately sends a 183 Session Progress.  Is
there a way I can change it so that it sends a 100 Trying instead? 
Because I am having some issues with a equipment where it does not play
a busy tone as a result of sending a 183 Session Progress then the 486 Busy.

Thanks

Remi