asterisk users - Feb 2009 - call forward all except the extension it is forwarded to

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

Vieri schrieb:
> 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
Use the "if" statement.

100 => {
	if ("${CALLERID(num)}" = "101") {
		// call 100
		Dial(SIP/100);
	}
	else {
		// forward to 101
		Dial(Local/101);
	}
}
> and freepbx.
Don't know about FreePBX. Ask on their mailing-list/forum/...


   Philipp Kempgen

-- 
AMOOCON 2009, May 4-5, Rostock / Germany   ->  http://www.amoocon.de
Asterisk: http://the-asterisk-book.com - http://das-asterisk-buch.de
AMOOMA GmbH - Bachstr. 126 - 56566 Neuwied  ->  http://www.amooma.de
Gesch?ftsf?hrer: Stefan Wintermeyer, Handelsregister: Neuwied B14998
--

Philipp Kempgen schrieb:
> Vieri schrieb:
>> 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?
> Use the "if" statement.
> 
> 100 => {
> 	if ("${CALLERID(num)}" = "101") {
> 		// call 100
> 		Dial(SIP/100);
> 	}
> 	else {
> 		// forward to 101
> 		Dial(Local/101);
> 	}
> }
Or use Caller ID matching:

100/101 => {
	// caller is 101
	Dial(SIP/100);
}
100 => {
	// for other callers
	Dial(Local/101);
}


   Philipp Kempgen

-- 
AMOOCON 2009, May 4-5, Rostock / Germany   ->  http://www.amoocon.de
Asterisk: http://the-asterisk-book.com - http://das-asterisk-buch.de
AMOOMA GmbH - Bachstr. 126 - 56566 Neuwied  ->  http://www.amooma.de
Gesch?ftsf?hrer: Stefan Wintermeyer, Handelsregister: Neuwied B14998
--

--- On Wed, 2/11/09, Philipp Kempgen <philipp.kempgen at amooma.de> wrote:
> >> 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?
> 
> > Use the "if" statement.
> > 
> > 100 => {
> > 	if ("${CALLERID(num)}" = "101") {
> > 		// call 100
> > 		Dial(SIP/100);
> > 	}
> > 	else {
> > 		// forward to 101
> > 		Dial(Local/101);
> > 	}
> > }
> 
> Or use Caller ID matching:
> 
> 100/101 => {
> 	// caller is 101
> 	Dial(SIP/100);
> }
> 100 => {
> 	// for other callers
> 	Dial(Local/101);
> }
I hacked the dialparties.agi script in freepbx and now it works for direct calls
but fails for blind transfers, probably because I need to check another variable
such as BLINDTRANSFER. Attended transfers seem to work.

Thanks