[SIPForum-discussion] Difference between stateless and statefulproxy in SIP protocol

[Rohan Sarker]

Hi Ashish,




For Reliance & Tata in India, we implement SIP Trunking for ZTE ZXC10 &
Huawei MSOFTX3000. I would like to know what type of Proxy is implemented
for them & why?





Regards
Rohan Sarker
IBM Pune & IBM Kolkata & IBM Bangalore
Tel:+919903051236
=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.=.


On 9/28/10, Ashish Mishra (ashismis) <ashismis at cisco.com> wrote:
>
>  Ruben,
>
>
>
> Stateless proxy does not remember anything once a request is forwarded.
>
> Stateful proxy remembers the request until the transaction is over.
>
>
>
> Benefits of stateful proxies are they are feature rich and useful for
> getting billing info, existing session modification/negotiation etc.
>
> B2B UA is transaction stateful proxy.
>
>
>
> Second part, there is something MAX-FORWARDS in SIP header, which will not
> allow more than 70 hops as per IETF recommendation.
>
> So more than 68 proxies cannot forward request between A to B.
>
>
>
> Hope that helps.
>
>
>
> -          Ashish
>
>
>
> *From:* discussion-bounces at sipforum.org [mailto:
> discussion-bounces at sipforum.org] *On Behalf Of *Ruben Roque
> *Sent:* Tuesday, September 28, 2010 9:37 AM
> *To:* discussion at sipforum.org
> *Subject:* [SIPForum-discussion] Difference between stateless and
> statefulproxy in SIP protocol
>
>
>
>
>
> Hi,
>
>
>
> 1) I want to know an example of a stateless proxy and a stateful proxy. Is
> B2BUA a stateless or stateful proxy?
>
>
>
> 2) If a INVITE request is to be sent from user A to user B, but there are
> 100 stateless proxies in path -- will the request be successfully delivered
> to user B?
>
>
>
> Thanks and Regards,
>
> Reuben
>
>
>
>
>
>
>
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