30 Jul
2008
30 Jul
'08
5:18 a.m.
Henning Westerholt wrote:
On Friday 25 July 2008, Alex G wrote:
Another possibility is that -- depending on what is on the far side of
the PSTN gateway (PRI?) -- the ringing is not sent in-band, and the
appropriate translation of the ISDN progress indicator ("PI") to OOB
ringing events is not configured?
--
Alex Balashov
Evariste Systems
Web : http://www.evaristesys.com/
Tel : (+1) (678) 954-0670
Direct : (+1) (678) 954-0671
Mobile : (+1) (706) 338-8599
I'm sure i'm not the first to experience
this. My polycom phones when
calling out a pstn gateway recieve far end ringing when dialing cellphones
in the US, but when i try to call a pots line i get no ringing, only
silence until the end point answers the call.
Any insight or help would be very appreciated. I have sip captures that i
can post, but opted not to incase someone has seen this and knows the
answer first.
Hi Alex,
perhaps the PSTN gateway or your polycom don't support early media? Check if
RTP is flowing in the "silent" case before the call is finally established
(with 200 OK).