asterisk users - Jan 2009 - blind transfer on hook-flash from SIP phone

Kevin P. Fleming wrote:

 
> This is because hook-flash support is in chan_zap, not in the core of
> Asterisk. There is no need to support hook-flash on any other channel
> type, because every other channel type supported by Asterisk has its own
> (more reliable) methods of signaling.
 

I'm seeing many discussions on how to provision Blind Transfer, Attendant
Transfer and Call Parking services using keypad keys # and * to invoke the
services, however its not clear to me how can it be possible without interfering
to normal call when service is not being invoked.

 

For instance, I usually access an external IVR system that uses # and * signals
in its menu for interaction with the caller. Let's say I provision a SIP
phone (that do not support services like Transfer locally) to have the services
provided by Asterisk. May question is, If I call to this IVR system and signals
# and/or * are required for interaction with the system, what will happen when I
dial # or *?

 

Is there any alternative to invoke mid-call services without using the # and *
signals? I was expecting to use Hook-Flash either via INFO or RTP
telephone-event.

 

Thanks a lot!

Marcelo.

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Hi Marcelo -
> Is there any alternative to invoke mid-call services without using the #
and
> * signals? I was expecting to use Hook-Flash either via INFO or RTP
> telephone-event.
You can change the keys used to invoke a service in features.conf.  I
know many people use ## or #1 for blind transfer so as to avoid issues
with IVR systems.

You may also want to change who has access to the various features
(caller vs callee).  You can do this with flags in your Dial
statement.  For example, if you have set the 'T' flag, the caller can
do a blind transfer.  If you only have the 't' flag set (notice lower
case) only the person receiving the call can do a blind transfer.


- Noah