asterisk users - Nov 2003 - Flash hook -> SIP device

Hi there

I have a Welltech Wellgate SIP device and I want to be able to do a supervised
transfer. I've read that in order to do that I have to use flash hook. The
problem is just that I can't flash hook with this device.

I'm in contact with the developer of the SIP device but don't know what
to tell him in order to get him to fix this.
What is happening when you flash hook, I mean how does Asterisk see and handle
this? What should the SIP device send to Asterisk so it works properly?

regards
Mickey Binder

>Hi there
>
>I have a Welltech Wellgate SIP device and I want to be able to do a 
>supervised transfer. I've read that in order to do that I have to 
>use flash hook. The problem is just that I can't flash hook with 
>this device.
>
>I'm in contact with the developer of the SIP device but don't know 
>what to tell him in order to get him to fix this.
>What is happening when you flash hook, I mean how does Asterisk see 
>and handle this? What should the SIP device send to Asterisk so it 
>works properly?
>
>regards
>Mickey Binder
Mickey -
   Flashhook events are transmitted as either RFC2833 events or SIP 
INFO events.  The people at Welltech should have that information in 
front of them, if they claim to be SIP programmers.  I'm still 
waiting for my SIP image for the 3701A 1-FXO/1-FXS box... they 
claimed that they would have that back in April.

RFC2833 method:
http://www.zvon.org/tmRFC/RFC2833/Output/index.html

INFO method:
http://www.zvon.org/tmRFC/RFC2976/Output/index.html

Translations:
http://www.mail-archive.com/asterisk-users@lists.digium.com/msg12558.html

JT