asterisk users - Aug 2009 - QuickPhones QA-342 and SIP/RTP Flash Event for Transferring

Greetings all- I've got an odd issue with a QuickPhones QA-342 WiFi SIP
phone. It registers correctly, makes calls, etc with no problems. The dtmfmode
is set to rfc2833.

HOWEVER, I'm unable to transfer calls with it. The proper procedure should
be to hit the 'Call' key which sends the flash event, we should get dial
tone, dial the number to transfer to, then hit 'Call' again to send
another flash event to complete the call transfer.

My packet captures show the phone properly sending the RTP flash events however
Asterisk is not doing anything about it. Am I missing something? Is there a
sip.conf config option I've missed? Anyone else have experience with this
phone and Asterisk?

Thanks!

Tim Nelson
Systems/Network Support
Rockbochs Inc.
(218)727-4332 x105

Tim Nelson wrote:
> Greetings all- I've got an odd issue with a QuickPhones QA-342 WiFi SIP
phone. It registers correctly, makes calls, etc with no problems. The dtmfmode
is set to rfc2833.
> 
> HOWEVER, I'm unable to transfer calls with it. The proper procedure
should be to hit the 'Call' key which sends the flash event, we should
get dial tone, dial the number to transfer to, then hit 'Call' again to
send another flash event to complete the call transfer.
This is not a normal SIP transfer, this is an analog transfer being done
via a SIP phone. Asterisk does not support such a mode, it relies on SIP
devices to do SIP transfers themselves. You will never get 'dial tone'
on a SIP device from Asterisk.

-- 
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
skype: kpfleming | jabber: kpfleming at digium.com
Check us out at www.digium.com & www.asterisk.org