Re: Any comparison Study on MGCP vs H.323, MGCP vs SIP

2000-05-15 Thread Dhaval Shah
Hi, > > As I said: > > > > > >For VoIP over telephony networks > > Your statements don't make sense; "VoIP over telephony networks" is an > oxymoron, since VoIP is, by definition, over an IP network. > > > some protocol is necessary between two telephony networks. > > > > FYI, there is a protoc

Re: Any comparison Study on MGCP vs H.323, MGCP vs SIP

2000-05-15 Thread Masataka Ohta
Stephen Sprunk; I dare reply because your mail demonstrates common misunderstandings by people outside of the Internet. > > > H.323 is defined for a LAN environment, not for telephone lines. > > > > For telephony people, the IP protocol is for a LAN environment > > that there is no difference be

Re: Any comparison Study on MGCP vs H.323, MGCP vs SIP

2000-05-15 Thread Stephen Sprunk
Sez "Masataka Ohta" <[EMAIL PROTECTED]> > > H.323 is defined for a LAN environment, not for telephone lines. > > For telephony people, the IP protocol is for a LAN environment > that there is no difference between H.323, SIP, TELNET, or DNS > for that matter. "Telephony people" are not relevant h

Re: Any comparison Study on MGCP vs H.323, MGCP vs SIP

2000-05-14 Thread Gaylord K. Miyata
speaking of telephony/telecom protocols, are there any "voice subscriber" MIBs/models - SNMP or CMIP oriented. I'm just looking for a model used for voice subscribers who are provisioned w/ some combination of AAL2, VOIP, GR-303, V.52. Thanks - gaylord

Re: Any comparison Study on MGCP vs H.323, MGCP vs SIP

2000-05-13 Thread Masataka Ohta
Harald; > At 09:19 13.05.2000 +0859, Masataka Ohta wrote: > >For VoIP over telephony networks (that is, mostly over non-Internet > >networks), H.323 and SS7 are the protocols to choose, because they > >are defined by ITU-T. > H.323 is defined for a LAN environment, not for telephone lines. For t

Re: Any comparison Study on MGCP vs H.323, MGCP vs SIP

2000-05-13 Thread Harald Tveit Alvestrand
At 09:19 13.05.2000 +0859, Masataka Ohta wrote: >For VoIP over telephony networks (that is, mostly over non-Internet >networks), H.323 and SS7 are the protocols to choose, because they >are defined by ITU-T. H.323 is defined for a LAN environment, not for telephone lines. SS7 is not a protocol acc

Re: Any comparison Study on MGCP vs H.323, MGCP vs SIP

2000-05-13 Thread Henning Schulzrinne
http://www.cs.columbia.edu/sip has a FAQ addressing this topic.

Re: Any comparison Study on MGCP vs H.323, MGCP vs SIP

2000-05-12 Thread Masataka Ohta
Christian; > Do you intend to replace H.323 ? > Definitely not. Just look at the picture above, which shows the relaying of > a call > between an SGCP controlled gateway and an H.323 agent. The combination of > gateways plus call agent forms a distributed H.323 system, which is > perfectl

RE: Any comparison Study on MGCP vs H.323, MGCP vs SIP

2000-05-12 Thread Christian Huitema
>From the SGCP FAQ (http://www.argreenhouse.com/sgcp/sgcp-faq.shtml) written two years ago: Do you intend to replace H.323 ? Definitely not. Just look at the picture above, which shows the relaying of a call between an SGCP controlled gateway and an H.323 agent. The combination of gatew

RE: Any comparison Study on MGCP vs H.323, MGCP vs SIP

2000-05-11 Thread Hubert Chang
Yes, I need this comparison too, please help. Hubert Chang -Original Message- From: Yixin Zhu To: [EMAIL PROTECTED] Sent: 5/11/00 10:55 AM Subject: Any comparison Study on MGCP vs H.323, MGCP vs SIP Hi, There are studies on the comparision of the two competing protocol SIP and H.323. H