2 Aug
2007
2 Aug
'07
6:58 p.m.
Hello,
courtesy of Glenn Marmon, Connecticut College Class of 2007, who
submitted the patch, OpenSER includes now support for SCTP (Stream
Control Transmission Protocol). It completes the list of the possible IP
transport layers that could be used with SIP in OpenSER.
You can find details about SCTP at: http://www.sctp.org/
Basically, it is a reliable transport protocol, like TCP, but provides a
number of functions that are critical for telephony signaling transport
(read more about the benefits: http://www.ietf.org/rfc/rfc3286.txt).
If you have the chance to own a SCTP-aware SIP phone and can test,
please provide us feedback on the mailing lists -- also, let us know the
name and type of any SIP phone with SCTP support that you know. Hope
SCTP will gain more and more space, as it seems to be the right protocol
for VoIP/IM&P signaling, where UDP cannot cope very well with huge
messages and TCP adds too much overhead.
Cheers,
Daniel
3 Aug
3 Aug
12:20 a.m.
New subject: [OpenSER-Users] Re: [OpenSER-Devel] SCTP support
Dear Daniel,
Thank you very much for integrating the code in. This is very good news
indeed!
We will continue to test this code, and add more meaningful use of
SCTP's features as we do more work with it. Who should we consider our
point of contact? Is there one? Or should we just get in touch with the
list again?
Thanks again!
- jana
--
Janardhan R. Iyengar
Visiting Assistant Professor
Connecticut College
http://cs.conncoll.edu/iyengar/
Daniel-Constantin Mierla wrote:
Hello,
courtesy of Glenn Marmon, Connecticut College Class of 2007, who
submitted the patch, OpenSER includes now support for SCTP (Stream
Control Transmission Protocol). It completes the list of the possible IP
transport layers that could be used with SIP in OpenSER.
You can find details about SCTP at: http://www.sctp.org/
Basically, it is a reliable transport protocol, like TCP, but provides a
number of functions that are critical for telephony signaling transport
(read more about the benefits: http://www.ietf.org/rfc/rfc3286.txt).
If you have the chance to own a SCTP-aware SIP phone and can test,
please provide us feedback on the mailing lists -- also, let us know the
name and type of any SIP phone with SCTP support that you know. Hope
SCTP will gain more and more space, as it seems to be the right protocol
for VoIP/IM&P signaling, where UDP cannot cope very well with huge
messages and TCP adds too much overhead.
Cheers,
Daniel
_______________________________________________
Devel mailing list
Devel(a)openser.org
http://openser.org/cgi-bin/mailman/listinfo/devel
10:59 a.m.
New subject: [OpenSER-Users] Re: [OpenSER-Devel] SCTP support
On Thursday 02 August 2007, Janardhan Iyengar wrote:
Dear Daniel,
Thank you very much for integrating the code in. This is very good news
indeed!
We will continue to test this code, and add more meaningful use of
SCTP's features as we do more work with it. Who should we consider our
point of contact? Is there one? Or should we just get in touch with the
list again?
Hello Janardhan,
nice to hear that you plan to further extend the SCTP feature set!
Discussion about new patches or extensions of features should take place at
the devel list. Actual code should be submitted to the project patch tracker:
http://sourceforge.net/tracker/?atid=743022&group_id=139143
This way no code submission will be lost or delayed because of vactation or
other responsibilities of developers.
Best regards,
Henning
11:35 a.m.
New subject: [OpenSER-Users] Re: [OpenSER-Devel] SCTP support
Dear Janardhan,
first I would like to thank you for assisting and helping with the SCTP
implementation.
On 08/03/07 00:20, Janardhan Iyengar wrote:
Dear Daniel,
Thank you very much for integrating the code in. This is very good
news indeed!
We will continue to test this code, and add more meaningful use of
SCTP's features as we do more work with it. Who should we consider our
point of contact? Is there one? Or should we just get in touch with
the list again?
the devel(a)openser.org mailing list is the place to discuss
development
issues. It is a list with fast feedback and nice results out of debates
there. Patches should be registered on the tracker.
Your broad experience with SCTP will help a lot. I looked some time ago
to SCTP but the lack of phones supporting the protocol discouraged me
(of course, there is the chicken-egg situation: phone developers need a
server, server developers need a client -- hope this is a good start
point for more SCTP in VoIP). I like the SCTP because the resources used
on server are similar as for UDP, on the other hand, it solves important
issues as transmission reliability and fragmentation.
Another issue I see, an I do not know if applies, does NATs cope with
SCTP? I haven't seen much SOHO routers advertising SCTP.
Another interesting topic would be TLS-SCTP, there is RFC, not time to
study it yet, do you have any experience with it? As I got it from
sip-implementors list, so far the SCTP was used mainly for trunking.
Cheers,
Daniel
Thanks again!
- jana
6327
days inactive
6328
days old
3 comments
3 participants
participants (3)
-
Daniel-Constantin Mierla -
Henning Westerholt -
Janardhan Iyengar