[asterisk-users] call forward all except the extension it is forwarded to

[Vieri]

I would like to know if I can set Call Forwarding on an extension but allow direct calls from the extension it is forwarded to.

Example:

Extension 100 sets call forwarding (all) to extension 101.

All calls to 100 are immediately forwarded to 101 as expected.

However, if 101 tries to transfer a call to 100 or tries to call 100 directly, it sounds "busy" because it obviously goes into a loop where 101 tries to call itself.

How do I set an "exception" so that 101 can actually call 100 even if the latter is forwarded to 101?

I'm using * 1.4 and freepbx.

Thanks

Vieri