[asterisk-users] preventing voicemail pickup after SIP redirect ?

[Louis-David Mitterrand]

Hello,

I'm using the classic [stdexten-macro] in extensions.conf whereby a call 
is picked up by voicemail after a certain ringing time.

When programming a SIP phone to redirect calls (SIP 302 redirect) to 
another extension I'd like to avoid that voicemail pickup so that the 
call goes into the new destination's voicemail (if applicable).

How can I detect that a call has been redirected and should no longer be 
intercepted by vm?

Thanks