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  • How to configure Asterisk to trigger intercom at call receiving side


Answer 

Add something like the following to your extensions.conf:

exten => 452,1,SIPAddHeader("Alert-Info: <http://www.notused.com>\;info=alert-autoanswer\;delay=0")


Note: in order for this to work, the receiving phone needs to allow auto-connect/intercom calls: see setting "Answer After Policy" .