[Asterisk-Users] Busy/on the phone detection with Cisco 7960

[Jeremy Koski]

When I pick up the handset to make a call, SIP 483 BUSY is returned
to the server and the below statement works. However, when I'm in a call, 
the BUSY status is not returned on my Cisco 7960 phones.

Is there a way to make this work when I'm actually on a call? Maybe 
DIALSTATUS is not the way to go about it.


exten => _2180616,1,Dial(${P500},20,tr)
exten => _2180616,2,GotoIf($["${DIALSTATUS}" = "BUSY"]?3:6)
exten => _2180616,3,Wait(1)
exten => _2180616,4,Playback(the-party-you-are-calling)
exten => _2180616,5,Playback(vm-isonphone)
exten => _2180616,6,Voice