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New Member

SIP

HI.

I have a CCM Release 4.2.3, My customer wants add a PSTN Access by SIP trunk with a Service Provider.

The SP has the next RFC

RFC 3261

RFC 4566

RFC 3550

With Codec G.711

My CCM support this RFC and trunk access or I need a IP-to-IP Gateways in order to access to the PSTN ?

Regards

2 REPLIES
New Member

Re: SIP

yes, you need a SIP Trunk with A PSTN Gateway.

Hall of Fame Super Gold

Re: SIP

Not necessarily you need an Ip-to-IP gateway.

The reccomandation is to use one so that you CM will not have internet-exposed interface and other general security and design issues, like authentication.

If you can work around that and are willing to try, it can be done even without IP-to-IP, but remember things like NAT, authentication, registration can be problems that the IP-to-IP would solve.

Please rate post if it helps!

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