Before last month's SG 16 meeting I raised the point of the proper use of Annex C values. Today I discovered that we already have it covered. See section 7.2.10, which states unequivocally that Annex C is for the Local and Remote descriptors.
One of the open issues on the list is whether we can deprecate the Modem descriptor. If we do so, the corresponding Annex C property can remain there and I would remove mention of it from my SDP-TDM draft.
There were some other Annex C properties that I had proposed to remove because they belonged in LocalControl. This wasn't done at the last SG 16 meeting because orderly procedure required list agreement plus alternative packages to put them in. The specific items I would focus on are Mode (tag 1002 in C.1), DialledN (tag 901F in C.9) and DiallingN (tag 9020 in C.9). Mode is in LocalControl already, and the other two are covered by the NAS package. I had also mentioned Gain (tag 100C in C.1) and Jitterbuff (tag 100D in C.1) previously. At this point I'd say Gain might suitably be specified by direction. Jitterbuff should be moved into RTP.
Tom Taylor taylor@nortelnetworks.com Ph. +1 613 736 0961 (ESN 396 1490)
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