Subject: RE: [Sipping] SIP-T and Segmentation

From: [email-masked]
Date: Wed, 20 Jun 2001 10:11:47 -0600

INFO is recommended for carriage of any encapsulated ISUP messages which do
not have an explicit SIP mapping (described in draft-ietf-sip-isup-0x). It
would be proper behavior for an originating gateway to encapsulate SGM in
INFO and to assume that the terminating gateway will reconstruct the ISUP
message itself from the segments.

As an optimization, it probably makes sense for the originating gateway,
upon receipt of any incomplete ISUP message, to await a SGM before sending a
SIP message containing the complete ISUP message. I can't see any reason to
extend the ISUP message segmentation mechanism into the SIP realm. SIP,
after all, has its own means of dealing with large messages.

Jon Peterson
Level(3) Communications

-----Original Message-----
From: Doug Hurtig [mailto:[email-masked]]
Sent: Tuesday, June 19, 2001 6:03 PM
To: [email-masked]
Subject: [Sipping] SIP-T and Segmentation

Hi,

  Does SIP-T support segmentation messages (sgm)?  If is the sgm sent in
  a second invite or is it included in the invite containg the ISUP message
which
  was segmented?

  Any help on handling of over-length ISUP messages with SIP would be
appreciated.

--
Regards,
Doug Hurtig

Tekelec
2425 N. Central Expressway
Richardson, Texas 75080

[email-masked]
972.301.1203

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