Hi, Nanda,

I think you may take a look at TRIP and ENUM. ENUM is able to mapping a
telephone number to an Internet URI. And TRIP can help to route a telephony
call to the PSTN.

BR.

------------------------------
Dr. LU Wei
Staff Research Member
Infrastructure Technology
IBM China Research Lab

----- Forwarded by Wei BJ Lu/China/IBM on 2002-04-02 10:04 -----
                                                                                       
                                          
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                    lumbia.edu                         Subject:     [Sip-implementors] 
Calling SIP phone from PSTN               
                                                                                       
                                          
                                                                                       
                                          
                    2002-04-01 23:25                                                   
                                          
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Hi,

Can anyone answer these questions ?

How is a SIP phone addressed while making a call from PSTN ? How does the
PSTN phone becomes available to the SIP proxy servers ?

Thanks in advance

Regards,
Nandan

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