[asterisk-users] SIP Extension Config Issue

[Joseph L. Casale]

I have a setup with a SIP DID inbound, and several SIP phones inside.
Obviously if the SIP phones are off/unplugged/otherwise not available,
incoming calls ring busy. My extensions.conf looks like this for inbound
calls:

exten => _1xxxxxxxxxx,1,Dial(SIP/200&SIP/201&SIP/202&SIP/203,30,tr)

So what could I do to send the call to voicemail if none of the extensions
are online?

Thanks!
jlc