Make extension set to autoanswer with intercom answer only after 2 or 3 rings


I can make extensions autoanswer setting them to intercom in the autoanswer field, so faz so good.
But I need it to ring 2 or 3 times before it answers the call, how can I achieve this?

Thanks in advanced,
Jorge Bastos,

That’s really a question about the phone, not the PABX I don’t know of any phones that support it.

I suppose you could make a call for 3 seconds without the autoanswer header, then a second with it set, but the recipient could pick up the phone between the two, and appear busy, and I don’t know how to implement it in FreePBX.