[Asterisk-Dev] SCTP support in asterisk?

[David Luyens]

SIGTRAN uses SCTP. It is spefically used to transport SS7 reliable...
Could be useful in some case where you want to transport specific
signalling or make iax more robust...

David

-----Original Message-----
From: asterisk-dev-admin at lists.digium.com
[mailto:asterisk-dev-admin at lists.digium.com] On Behalf Of Steven
Critchfield
Sent: Wednesday, October 08, 2003 4:14 PM
To: asterisk-dev at lists.digium.com
Subject: Re: [Asterisk-Dev] SCTP support in asterisk?


On Wed, 2003-10-08 at 08:01, Roy Sigurd Karlsbakk wrote:
> hi all
> 
> I've been doing a little reading about this SCTP protocol (RFC 2960. 
> Intro at RFC 3286). It seems to me this is a pretty ideal protocol for

> VoIP usage (as it's what it's been written for). Is this a protocol 
> that could improve asterisk in the future, or is AIX just as good? 
> SCTP is supported in linux 2.6 and 2.4.23-pre6 and later. I beleive 
> it's also supported in FreeBSD, although I don't know which versions.

SCTP wasn't written for VoIP, it is written as a reliable stream over IP
to coexist with TCP and UDP(at least this is what I understand of it).
SCTP doesn't provide signaling, nor does it provide codecs. You might
run IAX,SIP,or H.323 over SCTP instead of UDP. I think at this point you
may have difficulty with doing this on anything other than IAX where you
control both sides of the link and can make sure you have the support. 

Also SCTP was available in versions of linux earlier than that listed
above, but it wasn't part of the kernel distribution. Even when it is
part of the distribution, it will take quite a while for enough people
to update and activate that.

Just my thoughts for the moment.  
-- 
Steven Critchfield <critch at basesys.com>

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