[Asterisk-biz] h323 is a dying standard?

[Alex Pui]

Hi all,

Thanks for the feedback, so H323 is not going to die even in Asterisk 
environment, shall I supply hardware in H323 and the pre-configuration 
servers, can I have any LD provider to work with?

Alex

At 00:09 2005-1-27 -0500, Emilio Panighetti wrote:
>Actually:
>
>H.323 is an ITU-T Umbrella specification, in the same fashion as ISDN 
>protocol or the SS7 standard is for TDM networks.
>SIP is a protocol pushed by the IETF, so it doesn't have lots of the 
>baggage of a traditional telephony protocol and is engineer around the 
>HTTP/HTML communication concept.
>
>I agree that H.323 might be over engineered, but it offers some nice 
>features that I don't see in SIP, like it carries the full Q.931 
>completion codes in the same way ISDN or SS7 does. It uses TCP instead of 
>UDP but that is better when metering calls with millisecond precision. It 
>also lessens the chance of hung calls by IP network congestion, etc.
>
>Working with H.323 for the past 5 or so years, I agree that SIP is so much 
>simpler to work with, and H.323 seems more complex that needs to be, but 
>once it works, is very, very solid.
>
>H.323 wasn't created by Cisco. Actually, circa 1998, when Cisco came out 
>with AS5300 routers, most others were using proprietary technologies. 
>H.323 was being pushed mostly for video-conferencing systems (reason why 
>Polycom is an early adopter of H.323).
>SIP is fairly new compared to H.323/H.245 and was originally developed for 
>multiparty conferencing at Columbia U.
>Because SIP is maturing, and is easier to work with and has some call 
>control features that were designed from the ground up as an IP protocol, 
>it will over time replace H.323, and many carriers are migrating to SIP. A 
>prime example is Level3, which operates exclusively in SIP.
>Most 'big iron' hardware actually does SIP.
>Legacy equipment like Vocaltec or Clarent are actually Windows-PC based, 
>and never did H.323 too well anyways (Because of their proprietary 
>software stack, not because of the ill-choice of OS). (Hint: Maybe 
>somebody could make * run on these legacy hardware), and IMHO weren't well 
>suited to compete with appliances from Cisco, etc.
>
>E.
>
>On Jan 26, 2005, at 9:36 PM, Kenneth Long wrote:
>
>><my $0.02>
>>
>>H.323 was Created/Chaired/Dominated by Cisco Systems.
>>SIP was invented by Telcordia/Others to compete and
>>take market share away.
>>
>>Same goes with MGCP (cisco) versus MEGACO (nortel).
>>
>>The value of the protocol depends on who is selling
>>what. Nothing more.
>>
>></my $0.02>
>>
>>
>>--- Michael Bielicki <cypromis at gmail.com> wrote:
>>
>>>On Wed, 26 Jan 2005 15:24:17 -0800, Tracy R Reed
>>><treed at copilotconsulting.com> wrote:
>>>>On Wed, Jan 26, 2005 at 02:35:35PM -0800, Alex Pui
>>>spake thusly:
>>>>>On page 25 of Paul Mahler's "VOIP Telephony with
>>>*", he said "While H323
>>>>>support is present in Asterisk, H323 is a dying
>>>standard. Whenever possible
>>>>>you should use a more modern interface like SIP
>>>or IAX".
>>>
>>>H.323 is the primary inter operator and termination
>>>protocol. As Craig
>>>Southeren correctly stated at the GUUG Telephony
>>>Summit it simply
>>>refuses to die :D You will find that to push large
>>>quantites of
>>>traffic to close to any place in this world you will
>>>require H.323 and
>>>nobody in that league will accept anything but
>>>H.323.
>>>
>>>Just my 2cents EUR
>>>
>>>cheers
>>>Michael
>>>
>>>
>>>--
>>>Michal Bielicki
>>>http://www.asterisk.com.pl/
>>>_______________________________________________
>>>Asterisk-Biz mailing list
>>>Asterisk-Biz at lists.digium.com
>>http://lists.digium.com/mailman/listinfo/asterisk-biz
>>
>>
>>
>>
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