[Asterisk-Users] SIP device rings once on busy before giving busy tone with dialplan

[Olle E. Johansson]

Chris Orme wrote:

>>>exten => _00.,2,Dial(${TRUNK1}/${EXTEN:2},45,r)

Isn't the 'r' forcing a 'ringing' signal from start, regardless
of what the device you are calling are signalling. If you are calling
a SIP device, that device might return 'busy' and that's propably
why you first hear 'ringing' and then a 'busy' signal.

I would like app_dial gurus to explain the 'r' option a bit
more so we can document it better.

/O