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IP/PSTN interoperabilty

Hi,

I am looking for information on what are the different options available to create voice calls between PSTN phones and IP phones.

I'm looking for information on different protocols and standards. I know the main VoIP protocols available are H.323 and SIP, but I'd like to know how these interoperate with each other and also with PSTN. Also what implementations are available and how complete are they. I'd prefer open source if possible.

Other areas I'm interested in are: interoperability between PSTN and GPRS, in particular NAT as I understand that is a problem MoIP - I know there is V.150.1 but I can't find much information about it, has anyone implemented it? Are there any other standards to do this?

I'm really looking for good sources of information to get started.

Thanks for any help

Pete

Reply to
Pete Calvert
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Another spec to read is G.799.1 "Functionality and Interface Specifications for GSTN Transport Network Equipment for Interconnecting GSTN and IP Networks" (GSTN is General Switched Telephone Networks, and includes PSTN)

---------------- Hank Karl Eastern Regional Manager

+1 (203)207-0047
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Representing:

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ISDN, T1 RBS, E1 R2 CAS, Frame Relay, ML-PPP, X.25, ...
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Reply to
Hank Karl

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