caller ID and implementer's guide
Wuerfel, Randy P
Randy.P.Wuerfel at ICN.SIEMENS.COM
Fri May 14 11:17:40 EDT 1999
Perhaps this discussion has gone on too long, however I just wanted to point
out that when Paul uses the phrase "an EP cannot send a SETUP message to a
v1 or v2 EP ...", the phrase has no meaning (at least to me). We support
users (people!) on our H.323 system that register with a GK. The users are
mobile, and can thus register from any EP. Thus, when I initiate a call, my
ARQ indicates a destinationInfo alias address of a user that may at that
moment be using any type of an EP. Since my EP doesn't attempt to match a
transport address with an EP type (which would be a triviality anyway), I
have no idea of the EP type (v1, v2 or in the future v3) when I send the
Setup message.
Don't I need an H.225.0 message returned from the destination EP before I
can determine its type?
Please consider the proposals that Karl Klaghofer has made to resolve this
issue in Santiago.
==========================================================
Randy Wuerfel
IP/Data Networks Development
Unisphere Solutions, Inc. E-mail:
Randy.P.Wuerfel at icn.siemens.com
4900 Old Ironsides Drive Fax: (408) 492-4666
M/S 200 Tel: (408) 492-4375
P.O. Box 58075
Santa Clara, CA 95052-8075
-----Original Message-----
From: Paul Long [mailto:Plong at SMITHMICRO.COM]
Sent: Thursday, May 13, 1999 3:26 PM
To: ITU-SG16 at mailbag.cps.intel.com
Subject: Re: caller ID and implementer's guide
Chip,
Funny you should ask. In my first response to Glen, I said that we clear the
call, but just a few minutes ago I took another look at the code and found
that we completely ignore the calling party number IE in SETUP. Skip right
over the sucker. I must have been looking at how we handle the octet-3
extension bit for another IE, e.g., bearer capability (even Q.931 requires
it
to always be 1).
While it turns out that we accept a call regardless of whether the extension
bit under discussion is set, I still stand by my assertion that an EP cannot
send a SETUP message to a v1 or v2 EP with the extension bit of octet 3 set
to
0 and octet 3a present. I happen to know what my implementation does, and
the
impact is minimal, but there are bound to be implementations out there
that--through no fault of their own--will in effect become "broken" if we
decide that this bit can be set to 0 and this octet can be present after
all.
Paul Long
Smith Micro Software, Inc.
-----Original Message-----
From: Chip Sharp [SMTP:chsharp at CISCO.COM]
Sent: Thursday, May 13, 1999 3:49 PM
To: ITU-SG16 at MAILBAG.INTEL.COM
Subject: Re: caller ID and implementer's guide
What does your implementation do if it receives a "0" in the
Extension
field of Octet 3?
Chip
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