Paul,

yes. Reading through the definitions section of H.323 (again;-)), made me realize that it states that the definitions from H.225.0 and H.245 also apply to the H.323 Recommendation. I suppose that things are covered this way. Nevertheless, to improve readability, it wouldn't hurt to add explicit references to definitions for things that are rather important.

Frank

paulej@packetizer.com on 28/01/2001 21:48:30 To: ITU-SG16@mailbag.cps.intel.com@SMTP Frank Derks/HVS/BE/PHILIPS@EMEA2 cc: Subject: Re: Re: The meaning of "mode" in the H.323 Recommendation? Classification:

Frank,

I trust that Mike's answer to "mode" addresses your concerns.

With respect to "H.225.0 logical channel signalling", yes.. that should be H.245.

Paul

----- Original Message ----- From: "Frank Derks" frank.derks@PHILIPS.COM To: ITU-SG16@mailbag.cps.intel.com Sent: Friday, January 26, 2001 8:04 AM Subject: Re: The meaning of "mode" in the H.323 Recommendation?

Paul,

the sections I was referring to are the following:

• 6.2.8.1, 5th paragraph: "The transmitting terminal assigns each

individual mode ..."

• 6.2.8.1, 6th paragraph: "... audio modes ..."
• 6.2.8.1, 7th paragraph: "... indicates a set of modes ..."
• 6.2.8.1, 1st paragraph after the notes: "... dependencies between

operating modes ...", "...different sets of modes ..."

• 6.2.8.2, 3rd paragraph: "... certain symmetrical modes ...", " ...

using a particular mode ..."

Undoubtedly it appears in more places.

Something else that struck as strange, was section 6.2.8.6. It mentions

H.225.0 logical signalling procedures and

H.225.0 logical channels. I would assume that these should read "H.245".

Frank

paulej@PACKETIZER.COM@SMTP@MAILBAG.INTEL.COM on 26-01-2001 11:03:30 Please respond to paulej@PACKETIZER.COM@SMTP Sent by: ITU-SG16@MAILBAG.INTEL.COM To: ITU-SG16@MAILBAG.INTEL.COM@SMTP cc: Subject: Re: The meaning of "mode" in the H.323 Recommendation? Classification:

Frank,

I would need to look at the particular section of text or sections :-),

but

I if it isn't clear, I'd agree that it should be clarified.

Unfortunately,

it's too late to get such text into H.323 version 4.

If it is a short list of sections, post them here and I suspect folks will be able to get an answer to you before I get back into the office (I'm currently on the road). If the list is lengthy, just send it to me and

I'll

look at the sections when I get a chance. Do you think this is something that needs clarification in the implementers guide or something to try to get into v5?

Paul

----- Original Message ----- From: "Frank Derks" frank.derks@PHILIPS.COM To: ITU-SG16@mailbag.cps.intel.com Sent: Tuesday, January 23, 2001 7:33 AM Subject: The meaning of "mode" in the H.323 Recommendation?

...

Paul,

as I was reading through the latest draft of H.323v4, I came across

something that has

...

been in the recommendation for a long time, but that I never quite

grasped: "mode".

...

The recommendation talks about "mode" and there is a (H.245) message to

request

...

a terminal to use a certain "mode" (requestMode), but there is no

explanation of what

...

"mode" actually means. Shouldn't there be a definition of "mode" in the

Definitions

...

section?

Regards,

Frank

---

Frank Derks |Tel +31 35 6893238 | Advanced Development |Fax +31 35 6891030 | Philips Business Communications|P.O. Box 32 | |1200 JD Hilversum | |The Netherlands | ----------------------------------------------------| E-mail: mailto:frank.derks@philips.com | WWW: http://www.sopho.philips.com |

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