Subject: FW: Communication from Study Group 8 on MEGACO and T.38

From: Tom-PT Taylor <[email-masked]>
Date: Tue, 12 Oct 1999 14:56:40 -0500

Please note suggested updates to requirements.  This note comes from the
Study Group that owns FAX standardization.

> -----Original Message-----
> From: Herman R. Silbiger [SMTP:[email-masked]]
> Sent: Tuesday, October 12, 1999 12:41 PM
> To:   [email-masked]; Taylor, Tom-PT [CAR:B904-I:EXCH]
> Cc:   Parsons, Glenn [NORSE:6L45-I:EXCH]
> Subject:      Communication from Study Group 8 on MEGACO and T.38
>
> ITU - Telecommunication Standardization Sector
>
> STUDY GROUP 8 MEETING
>
> Maidenhead, 24 September 1999
>
> Question(s): 4/8
>
> LIAISON STATEMENT/COMMUNICATION
> TO: SG 16 (Q.14/16) & IETF MEGACO
> STATUS: Approved by ITU-T SG 8
> FOR: Action
> DEADLINE: February 2000
>
> CONTACT: Glenn Parsons Tel:    +1 613 763 7582
> Nortel Networks Fax: +1 613 765 4461
> P.O. Box 3511, Stn C  Email:    [email-masked]
> Ottawa, ON K1Y 4H7
> Canada
>
>
> Study Group 8 appreciates your recent liaison regarding Media Gateway
> Control.  We have reviewed your proposed H.gcp/H.248 and are concerned
> about the omission of much detail on fax and specifically T.38 support.
> As a minimum, for simple interworking, at least a fax media indication
> and a T.38 transport indication is required in H.248. As a result we
> propose several additions to your draft H.gcp:
> 1. Under the requirements section 'fax protocol' is mentioned in 7.2.2.
> There are several fax protocols, though the one likely of interest in
> this case is 'T.38' so it should be mentioned explicitly.
> 2. In 8.2.3.5 'T.38' is indicated as a modem type.  We believe that this
> is inaccurate.  T.38 would be better described as a transport type
> (similar to RTP).
> 3. Also in 8.2.3.5 we suggest that 'fax' be added as a valid medium
> value.
>
>
> In addition, it may make sense to create a H.248 fax line package that
> describes the characteristics of a T.38 Internet Aware Fax device
> similar to the proposed line packages for IP phones.  SG8 would welcome
> working with SG16 to define this line package.
> Finally, we continue to work the fax details for call establishment in
> the decomposed gateway model.  We have attached drafts of our Proposed
> T.38 Annex D - SIP Call Establishment and Annex E - H.248 call
> establishment for your review.
> As a final note, we support the joint activity which ensures that only
> one standard media gateway protocol is produced between the ITU-T and
> IETF.
> ___________________
>
>