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RE: [Sipping] Comments of draft-ietf-sipping-isup-02

Title: RE: [Sipping] Comments of draft-ietf-sipping-isup-02
Jon,
My practical experience with real live traffic has been that even after a call is established once in a rare while we do get network generated drop in call by a number of causes such as Rel with Temp Failure, Network Out of Order. But at the SIP interworking this gets lost since BYE is sent, which does not have a Reason Header that you envision for CANCEL. It would be very good to have the Reason Header for the BYE msg also as an optional header (this would be helpful not just for ISUP access to PSTN but also with Q.931, etc).
 

Thanks,
Romel Khan
Net2Phone

-----Original Message-----
From: Peterson, Jon [mailto:jon.peterson@neustar.biz]
Sent: Monday, June 17, 2002 8:17 PM
To: 'Moter Du'; 'sipping@ietf.org'
Subject: RE: [Sipping] Comments of draft-ietf-sipping-isup-02

Thanks for both of these rounds of comments below. We'll make editorial changes as appropriate.
 
Note that work on the Reason header will allow a CANCEL to carry the cause code from an REL - effectively, the Reason header provides a way to preserve the cause code with translation rather than encapsulation. A BYE, on the other hand, is always normal clearing (16), as far as I know.
 
Thanks also for the tips on number portability mapping - capturing all of the conceivable national variants for NP is very difficult.
 
Jon Peterson
NeuStar, Inc.
-----Original Message-----
From: Moter Du [mailto:moter.du@siemens.com]
Sent: Friday, June 14, 2002 4:54 AM
To: 'sipping@ietf.org'
Subject: RE: [Sipping] Comments of draft-ietf-sipping-isup-02

trivia:

7.2.3 If no ACM..., "then" ISUP message...

8.2 The 200 in the figure should be right-to-left.  The ACK should be left-to-right.

Moter

-----Original Message-----
From: Moter Du [mailto:moter.du@siemens.com]
Sent: Wednesday, June 12, 2002 6:20 PM
To: 'sipping@ietf.org'
Subject: [Sipping] Comments of draft-ietf-sipping-isup-02


6.2.4 In the SIP bridging situation, the ISUP REL message may be included in the body of SIP responses, or SIP requests such as CANCEL or BYE.  The latter is applied when REL cause value is 16.

6.2.9 Reason phrase of 183 is "session" progress.
7.2.1.1 Just for your information.  Concerning number portability of the ITU-T variant, translated number can be found in either

- The digits prepended to called party number of CPN, if Nature of Address (NoA) is 8; the number of digits prepended are defined for national use, or determinated by a delimiter which is also for national use only.

- The optional Network Routing Number (NRN) parameter; in this case CPN would represent priorly called party number
- The Called Party Number (CPN) parameter, if an optional Called Directory Number (CDN) representing priorly called party number is present


Moter