Re: Role of MGW in SIP to SIP calls

SIP to SIP calls do not go through the MGW unless a transit through the CS 
network is required. But other H.248-controlled entities such as NATs or 
transcoders may lie along the path.

Priya Krishnan wrote:
> IMS core is my main concern where MGW is mainly for VCC and CS
> interoperability. For SIP-SIP which is pure IP , will MGW have statistics
> [will it even go through MGW] , this  is my question in particular ?
> 
> How will  IP qos which is realized through intserv, diffserv etc.. relate to
> these parameters in MGW [Mos, delay , Jitter].
> 
> I think answer to my first question wil help for this part because if SIP-SIP
> always goes through MGW in IMS for various other goodies MGW has to offer
> [echo cancellation, any transcoding etc.. and repacketization anyways] then I
> have already found answers already to my second one. IP diffserv helps in
> prioritization and MGW helps in dealing with actual voice coding details.
> 
> Thanks in Advance for your help. Am new to both areas and trying to relate
> them. I dont find this ifo explicitly anywhere.
> 
> Best regards Priya Krishnan
> 
>...