Hi
this is really a common practice among carriers. Actually the SS7 case
is easier because, unlike in SIP with the To, From..., in a regular ISUP
call the details of the initiating call are not sent in the backwards
direction: an ANM message indicating the call was answered doesn't carry
the numbers in the IAM that initiates the call. So it's a matter of
billing properly and accurately.
Javi
On 03/22/2013 03:27 PM, Alex Balashov wrote:
Yes, but what happens when those modifications, or responses based on those
modifications, are returned to the sender? Much as with most SIP headers, the sending SS7
gateway can well say, "I didn't send that."
Javi Gallart <[email protected]> wrote:
Thanks Alex
the first thing that came to my mind is performing some number
manipulation. Imagine kamailio acting as a router for several carriers.
One of them demands an international NOA with a weird prefix, whereas
the other one, for the same destination, requires a pound (#) at the
end, and so on. I agree with you in disliking idea of being too
"invasive" in the body of the sip message, but it's something already
doable for instance with SDP.
Javi
On 03/22/2013 02:50 PM, Alex Balashov wrote:
Hi Javi,
The first question to ask is: if Kamailio could understand ISUP
parameters, what would it do with them?
If the answer is "not a whole lot", chances are it is something that
only needs to be understood by the endpoints, and which Kamailio
would
continue to be agnostic to, as it is now. Kamailio is, above all
else, a message relay.
-- Alex
_______________________________________________
sr-dev mailing list
[email protected]
http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-dev
_______________________________________________
sr-dev mailing list
[email protected]
http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-dev
