We have several clients that are setup similarly. We learned that the
infrastructure handles all the traffic fine in our environments as along
as you are using a low bandwidth codec.
Bob Hartung wrote:
We have a VOIP phone system (Altigen), approximate 120 users in 2
locations.
Like your proposal, we have VOIP desk phones that sit between the
network and the PC. Our system supports about 20 analog phones as
well. I've not experienced any problems with this other than people
unplugging the power from their phones for one reason or another.
We've also had a few instances where a problem on the phone creates an
issue with the data connection. Replacing the phone has fixed the issue.
We have all HP Procurve 2600 and 2800 series switches. We have very
good voice quality. I think what your vendor is telling you about
voice traffic is true. At any given time, I don't think we ever have
more than 10 - 12 concurrent phone sessions running; generally it's
less so the level of network traffic generated by VOIP is fairly small
compared to data. We're using the highest quality codec which produces
the highest level of network traffic.
If your network is really busy and has a ton of data traffic, you're
likely to get echoing and choppiness if you don't have VOIP packet
prioritization set properly on your switches. As far as typical 100 MB
or better networks, I don't think it's ever really an issue for
internal calls. VOIP over the internet is a whole different issue.
Good luck with your project.
----------------------
Bob Hartung
Wisco Industries, Inc.
736 Janesville St.
Oregon, WI 53575
Tel: (608) 835-3106 x215
Fax: (608) 835-7399
e-mail: bhartung(at)wiscoind.com
------------------------------------------------------------------------
*From:* Tom Miller [mailto:[email protected]]
*To:* NT System Admin Issues
[mailto:[email protected]]
*Sent:* Mon, 02 May 2011 08:38:41 -0500
*Subject:* VOIP design questions
Folks,
We are planning to retire our current phone system and move to a
Mitel VOIP system. Not having implemented VOIP before, I have
some questions for those of you that have:
- our vendor claims our current data network can easily handle
VOIP traffic since it's a small amount of traffic (don't know
exact amount yet, still awaiting vendor response). As such, they
tell it is possible to use our current network to accommodate
voice and data. I'm not sure if I"m comfortable with this. I was
thinking of a more segregated approach: different network and
voice and data never intersect.
- our vendor claims we can use the existing data jack for the
phones, and plug the desktop PCs/laptops into the phone as a sort
of switch. I'm thinking this would add another level of
complexity: phone is broke and by the way you can't get on the
network now.
- the reason the vendor suggests the above is that the current
voice drops (cat5) terminate to phone patch panels (in most
cases). Those cables would need to be cut and re-terminated to
switches.
So I have some concerns about our vendor claims. The dollar
figure they propose does not include network changes, new
switches, etc. Looking at the cost proposal, I am thinking there
are quite a few hardware and man-hours costs missing.
What do you folks do for VOIP?
Thanks,
Tom
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