[SIPForum-discussion] 180 Ringing not generated

[Rohan Sarker]

Some SIP networks use MVC [Model -- View -- Controller] Frameworks for
interfacing SIP Calls. I just suspect that failure in nodes of higher
order MVC such as MVC-70 can be the cause of failure in Response in
SIP.

A few days ago, I received a call from an experienced Pakistani
Businessman who is working in Saudi Arabia- Korea for connectivity to
Pakistan and is facing VOIP-SIP Registration problem in SIP because of
higher order MVC failure. MVC is just a connector cable used for
networking in the Hardware Model.

Hope that helps.



Regards
Rohan Sarker
IBM Kolkata & IBM Bangalore
Tel:+919903051236

On 9/9/10, Kumar, Satish <satish.kumar at ti.com> wrote:
> Hi Vidya,
> You can check whether RTP packets are received from remote end to local end
> point thru sniffer. This may confirm the problem is at local end point or
> remote end point. If RTP packets are seen on the sniffer, your local end
> point is not handling them properly.
>
> -Satish
> ________________________________
> From: discussion-bounces at sipforum.org
> [mailto:discussion-bounces at sipforum.org] On Behalf Of AMIT ANAND
> Sent: Wednesday, September 08, 2010 7:37 AM
> To: vidhya gopalan
> Cc: discussion at sipforum.org
> Subject: Re: [SIPForum-discussion] 180 Ringing not generated
>
> Hi Vidhya,
>
> Ideally Ring should be generated from the last end ( Final Destination ) or
> the actual called party. You can not do much trouble shooting at your end ,
> you could only show this to your next hop if that is also belongs to your
> company then to next hop to that.
>
> One possible reason might be that called party is not generating 180 or its
> getting lost in network ( which wont happen every time ) or your server is
> not processing 180 ( For this you need to capture the packets coming in from
> next hop)
>
> But if they are not sending then you can not do much trouble shooting.
>
> Hope this helps
>
> Cheers
>
>
>
>
> On Tue, Sep 7, 2010 at 1:04 PM, vidhya gopalan
> <vidhyagcse at gmail.com<mailto:vidhyagcse at gmail.com>> wrote:
> Hello everyone,
>
> I am just a beginner in SIP. I am sending a INVITE from one of the
> endpoints, but the other endpoint doesnt send 180 Ringing back. wat could be
> the possible reason for failure.
>
>
>
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>
>
> --
> Thanks
> Amit Anand
>