[VoiceOps] SIP calls that aren't torn down

Alex Balashov abalashov at evaristesys.com
Tue Jun 7 17:21:05 EDT 2011

On 06/07/2011 05:09 PM, anorexicpoodle wrote:

> Our Sylantro platofrm used RFC 4028 for this, and we encountered
> numerous issues where the endpoints simply wouldn't behave
> appropriately

Oh, we know a thing or two about popular endpoints not behaving 
appropriately.  :/


I vastly prefer endpoints that don't support SSTs, as they remove any 
such unpredictability and allow our properly SST-supporting, 
4028-compliant B2BUA to do its work.

When endpoints advertise support for SSTs, the standard says our UA has 
to accept that, and then, of course, the far-end breaks it.

Alex Balashov - Principal
Evariste Systems LLC
260 Peachtree Street NW
Suite 2200
Atlanta, GA 30303
Tel: +1-678-954-0670
Fax: +1-404-961-1892
Web: http://www.evaristesys.com/

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