SIP server

[Bob]

Hi there,

I would like to develop a VOIP SIP server - something that allows VOIP soft
or hard phones to register themselves and then provide redirection services
to anyone calling the registered phones.

I don't propose to write all this myself... instead I was hoping someone
could point me to any good quality but not hugely expensive SDKs or similar
that will help me achieve this. I'll basically tie the SDK in with a few
other ideas we are working on.

Just to clarify, I am not wanting to develop a VOIP client or a softphone...
I am trying to develop a SIP server.

If anyone in this newsgroup has any experience or info relating to this then
please point me in the right direction.

Cheers

 

[Ray Cassick \(Home\)]

What kind of 'server' are you wanting to write?

Voice mail
SIP Proxy
IVR

You also have to deal with the RTP audio path and control (RTCP) control
messages.

I have been looking around for a while for a .NET based SIP stack but have
not been very lucky at all.

I think the market would be ripe for one...

The SIP protocol is fairly simple (text based challenge response type
protocol over UDP or TCP) but there are many vendor specific things that can
extend it.

 

[Bob]

Hi Ray,

I was just wanting something really simple right now... a SIP server to
handle registration of phones and to allow lookup of other phones and
redirection to them. Basically a directory server. Not interested in any of
the more high end stuff like voice mail just yet.

I too have had little luck finding anything I can plug into .Net but still
hoping someone will point me to one.

If you have, or come across, any info that might be useful to me please
provide some links.

Cheers