RE: IP Phone Advise
- From: "Amy Babinchak" <amy@xxxxxxxxxxxxxxxxxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Fri, 2 Apr 2004 08:49:03 -0500
Tom,
If the phones are isolated from the computer network do they need to be
behind a firewall? Are they vulnerable to attack? I haven't been to the
presentations on these systems yet (next week) but I would expect that
they are using flash memory and nothing else?
Does ISA 2004 support SIP?
-----Original Message-----
From: Thomas W Shinder [mailto:tshinder@xxxxxxxxxxx]
Sent: Friday, April 02, 2004 8:40 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: IP Phone Advise
http://www.ISAserver.org
Hi Amy,
There is a reason to have IP phones behind a firewall. Unfortunately, it
won't be behind an ISA firewall, because it doesn't support SIP phones
(or any others, for that matter), unless you want to assign each phone a
static address and create a publishing rule for each phone. So, its
possible for a smallish shop, from what I here (I haven't used IP phones
myself, but I do have information on some phones that appear to work if
you want to do the legwork).
HTH,
Tom
Thomas W Shinder
www.isaserver.org/shinder
ISA 2004 Beta - Get it now!
http://www.microsoft.com/isaserver/beta/default.asp
ISA Server and Beyond: http://tinyurl.com/1jq1
Configuring ISA Server: http://tinyurl.com/1llp
-----Original Message-----
From: Amy Babinchak [mailto:amy@xxxxxxxxxxxxxxxxxxxxxxxxxx]
Sent: Friday, April 02, 2004 7:37 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] IP Phone Advise
http://www.ISAserver.org
I have a client that is replacing their phone system and is likely to go
with a system that has at least some IP phones. They have 3 locations
and full time people that work from home and plan to expand into 2 more
locations soon so IP makes some sense for them. It will be much cheaper
for them to purchase a single phone system and maintain it from one
location. They are running SBS2003 and Citrix servers. Everyone connects
to the main office there are no servers at the other locations.
We've got lots of bandwidth at every location the remotes have 768 or
1000 SDSL and main office has 2.0 cable. Everyone has a static IP
address. No bandwidth problems yet.
Here are my concerns: Everyone needs to maintain good bandwidth. I'm
thinking that a separate Internet line for the phones would be a good
idea. Not only could it provide some redundancy in case of failure but
it would preserve the existing bandwidth for applications. If I can't
convince them of this or if I have to use the same cable as the computer
systems then I'm also concerned about the ISA server. Should I run the
phones through the ISA? Is there a reason to have IP phones behind a
firewall?
Thanks,
Amy
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