16 Oct
2006
16 Oct
'06
10:47 a.m.
After spending some time searching about this problem, It seams that
there are 2 options to solve it:
* configure an appropriate RTP timeout on the gateway. For instance, a
if there is no packets after 10 seconds, cancel the call.
* configure Ser to modify Session Headers setting an onreply_route with
the following code which "emulates" session-timer support in the user
agent that sent 200 OK:
##########################################################
if (status =~ "2[0-9][0-9]") {
remove_hf("Session-Expires");
append_hf("Session-Expires: 120;refresher=UAC\r\n");
};
##########################################################
Some people say that this implementation is a violation of the
Session-Timer draft, and because of that, it's a workaround that only
works with some gateways... I use Asterisk as my PSTN gateway...
For those like me that use Ser+Asterisk, which of these options to solve
this problem do you recommend me? Is there other way that I haven't
found to solve it? Should I trust the emulation of session-timer in Ser?
wouldn't it give me trouble in the future?
Thanks in advance,
Ricardo.
Greger V. Teigre wrote:
This matter has been discussed throughly on the list,
more than once.
Do a search on "BYE accounting" and I'm sure you get plenty of hits.
http://iptel.org/listsearch
g-)
Andreas Wernitz wrote:
Ricardo Carvalho wrote:
Meanwhile I was making my scripts for management
of the accounting,
I realized and after some call has been answered if the called party
simply has a power failure or network failure, no BYE message ever
gets returned to the other party, what results in the acc table in
one ACK message and after that no more messages belonging to that
call-id. This can mean erroneously that the call is still in
progress eternally, resulting in an enormous billing to the caller!!
This is a very serious issue! How can I protect my system from this
kind of problems?
if you are billing onnet calls, you're lost. if you bill calls to the
PSTN,
you can try to correlate your accounting data with accounting data
provided by the gateway.
perhaps your gateway provider does offer Session Timer ?
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