10 Nov
2009
10 Nov
'09
3:17 a.m.
Hi, Alex
You are right... the ACK is related to the INVITE not the 18x
messages... the 18x messages appear between INVITES and the related
ACKs.... my bad... :)
But I think that Rajesh got the idea... ;)
Edson.
Alex Balashov escreveu:
Edson - Lists wrote:
Just have in thoughts that this time will be the
time between the ACK
related to the "18x-Progress" message and the BYE.
This is not correct.
ACKs are not sent in response to 1xx-class provisional messages, except
when PRACK (100rel) is used--which your sentence does not imply.
The CDRs put out by 'acc' are digests of various call progress events;
it is up to you to calculate the time difference between a 200 OK (in
response to an INVITE transaction if you wish) and a BYE, using, for
example, database triggers.
The solution to this problem does not revolve around the use of a media
proxy, nor is reliance on a media proxy intrinsically "more accurate."