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.
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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