
I expect this should really go to the H.323 Implementors list, but maybe some people out there want to answer James. -----Original Message----- From: Yu, James [mailto:james.yu@neustar.com] Sent: Thursday, September 06, 2001 2:29 PM To: 'sip-h323@yahoogroups.com' Subject: RE: [sip-h323] Charles, Cisco has a proposal to support number portability for H.323. My question on H.323 is "who, the GK or GW, will do the NP queries? I guess that either one can do it but just want to know in the real world who will be doing that. James -----Original Message----- From: Agboh, Charles [mailto:charles.agboh@ebone.com] Sent: Tuesday, July 31, 2001 6:17 PM To: 'sip-h323@yahoogroups.com' Subject: RE: [sip-h323] Hi Ranjit, I believe TRIP will close that gap (contact details and thier expiration/keepalive). Regards, Charles -----Original Message----- From: Ranjit Kumar Avasarala [mailto:ranjitka@email.masconit.com] Sent: Wednesday, August 01, 2001 12:02 AM To: sip-h323@yahoogroups.com Subject: RE: [sip-h323] Hi Charles, But RFC 2543 does not mandate processing of Expires header. What is says is time duration mentioned in Expire header field can be used as upper limit For the user to respond. So since it is optional it depends on the SIP Proxy / Registrar implementation. I was thinking of the case Where it is not implemented. Regards Ranjit Mascon Communication Technologies http://www.masconit.com Ph: 847-240-2444 -----Original Message----- From: Agboh, Charles [mailto:charles.agboh@ebone.com] Sent: Tuesday, July 31, 2001 4:42 PM To: 'sip-h323@yahoogroups.com' Subject: RE: [sip-h323] Hi, Ranjit; You may have looked at this but, the Expires header and optional "expires" Contact parameter is just for that (Expires t; where t is time in seconds (i.e. 0)). See Section 4.2.6 of http://www.cs.columbia.edu/sip/drafts/draft-ietf-sip-rfc2543bis-02.pdf for details. Also see section 7.4 of http://www.cs.columbia.edu/sip/drafts/draft-ietf-sip-rfc2543bis-03.pdf. I hope this helps. Regards, Charles
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The NP query can be done at various points in the network such as in the PSTN or in the h323 network. In h323 network, it could be by the GK or GW(ways of doing this is beyond the scope of the standard - H.460.2). In real world, mostly it'll be done in SS7 network outside the H.323 network or by the H.323 GKs. - Raju Tom-PT Taylor wrote:
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participants (2)
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Raju Nadimpalli
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Tom-PT Taylor