Alternative for cisco sip proxy server

[pandiarajan.it21]

We are looking for SIP proxy servers. When I checked cisco, cisco proxy servers are no longer available http://www.cisco.com/c/en/us/products/unified-communications/sip-proxy-server/index.html. What is the alternative product for cisco proxy servers?

In  our lab, we have a Voip Gateway (series:  C2900, IOS: 15.3(3)M), 2 CUCMs  (version  9.1  and 10.5)  and around 20+ phones.

Is it possible to use our existing Voip Gateway as a sip proxy server?

Thanks,

Pandi

[Vivek Batra · Accepted solution]

AFAIK, SIP proxy is RFC term and not used in enterprises. B2BUA is used indeed. CUCM and CME both are back-to-back-user-agent (B2BUA).

Call Manager Express runs inside the IOS and you can use it as a SIP server.

Do you expect any thing specific from SIP proxy?

- Vivek

[pandiarajan.it21]

Thanks Vivek,

We are looking SIP proxy for routing, registration, accounting and authorization.

Our lab setup looks like the below one.

IP Phone => CUCM => Gateway => SP Provider Network

In this case, our CUCM will act as sip proxy right? Or our gateway?

Thanks,

Pandi

[Vivek Batra · Accepted solution]

Hi Pandi,

From top level if you see, both CUCM and Gateway are acting as SIP proxy because both are processing SIP messages independently however from RFC perspective, these are not SIP proxies indeed B2BUA. SIP proxies come in two flavors viz stateful and stateless. Although stateful proxy maintains the transaction state, but B2BUA is more than that which treats each call leg of a call independently.

Anyway CUCM can do all jobs mentioned by you.

- Vivek

[pandiarajan.it21]

Thank you so much Vivek.

[Vivek Batra]

You're most welcome!

- Vivek