> This seems like a great idea.  Would you share with us how such
> pre-ring
> extension?

With standard Asterisk just do the following:

Set some variables in your extensions.conf file.
MYCELL=4165551212
DESKPHONE=Zap/3
CELLPHONE=IAX2/user:[EMAIL PROTECTED]/${MYCELL}

This is assuming you have an extension 501 for your own phone.
exten=> 501,1,NoOp,"Ring Richard's desk then desk+cell"
exten=> 501,n,Dial(${DESKPHONE}/s,10,TWr)
exten=> 501,n,Dial(${DESKPHONE}&${CELLPHONE}/s,20,TWr)
exten=> 501,n,......

This will dial your deskphone for 10 seconds, then dial both your
deskphone and cellphone (via your voipprovider) for 20 more seconds.
Set the timing so that the 20 seconds is less than the amount of time
it takes your cellphone to go to voicemail. That way, it will ring to
your cellular but Asterisk will run out of time and pull it back to
continue processing at home and go to alternate routing/voicemail/etc.

dbc.

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