So "pure Internet SIP" won't work for all of us any time soon.
Glad to clear up the confusion on this point. People on the PSTN can
dial in and can be called from the SIP conferencing server by using a
service provider that has standard PSTN-SIP gateways. The typical SIP
voice conference has both PSTN users and SIP users. Works quite well for
everybody.
IM can also be used at the same time, by those who prefer it to real
time voice. Several SIP clients do both, actually video and data as
well.
Thanks, Henry
-----Original Message-----
From: sip-admin(_at_)ietf(_dot_)org [mailto:sip-admin(_at_)ietf(_dot_)org] On
Behalf Of Harald Tveit Alvestrand
Sent: Tuesday, March 25, 2003 1:14 PM
To: Richard Shockey; ietf(_at_)ietf(_dot_)org
Cc: sip(_at_)ietf(_dot_)org
Subject: Re: [Sip] Eating our own Dog Food...could the IAB
and IESG use SIP for conference calls
Thanks for the idea!
injecting a slight dash of cold water....
- the actual cost of "Teleconferences and Long Distance
charges" in 2002
were USD 82.210 (unaudited) (vs 54.400 for 2001). A
significant fraction of
that, but far from all, is the IESG teleconferences.
- we've already switched teleconference providers once to
reduce costs,
going from call-everyone to most-people-call-in.
- the costliest part of the IESG teleconferences has been the
callout:
international participants (last year, France, the
Netherlands, Norway and
Sweden when they are at home, hotels literally anywhere in
the world when
they are travelling) are called rather than calling in. You
don't want to
discuss with your boss why you had to make a 2 1/2 hour
international call
at hotel room rates if you can avoid it......
- it's absolutely essential that one be able to participate
in the IESG
telecon from just about anything that one can dial from - we've had
participants on cellphones from trains, in airport lounges,
hotel rooms and
other places. So SIP-only won't work for some time yet.
- even at work, several of us have problems with firewalls;
about half the
IESG uses Jabber during sessions - the reason many of the
others don't is
that they can't get Jabber through their corporate firewalls.
So "pure
Internet SIP" won't work for all of us any time soon.
So I think this is a good idea, PROVIDED THAT:
- The SIP teleconference bridge provider is able to provide either
800-number access or callout services to normal telephones in
most corners
of the world
- The voice quality, operator quality and call stability is
competitive
(yes, we've got the "there's an echo on this conference - can
you figure
out who is echoing and fix it" request down to a matter of routine)
A "normal" teleconference provider that *also* allows SIP
dialin over the
Internet would probably be perfect. If you have one - send
email to me -
PRIVATELY - and I will forward to the relevant parties at the
secretariat.
Harald
--On mandag, mars 24, 2003 19:04:17 -0500 Richard Shockey
<richard(_at_)shockey(_dot_)us> wrote:
Like many of us I was moved my Harald's appeal for suggestions for
helping to cut down costs in the IETF.
I certainly endorse the idea of considering Canada or Mexico as
possible sites for future IETF meetings, but I suspect that
the weekly
teleconferece calls that the IAB and IESG have represent a
significant
line item for the Secretariat.
In case anyone has not heard, SIP is quite capable of handling this
type of task and there are a variety of commercial as well as open
source Client User Agents as well as commercial products
and services
that could help reduce this cost.
I'm sure the SIP working group could help the Secretariat identify
products and services that could make this essential function more
productive and operate at less cost.
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