Telephones for Noisy Data Centers

Jay Hennigan jay at
Thu Jun 18 04:29:33 UTC 2009

Michael J McCafferty wrote:
> All,
> 	I'd be OK if we were in a facility that was only average in terms of
> noise, but we are not. I need an exceptional phone for the data center.
> Something that doesn't transmit the horrible background noise to the
> other end, and something that is loud without being painful for the user
> of this phone. Cordless would be very fine, headset is excellent.
> Ordinary desk phone is OK... but the most important thing is that it
> works for clear communication. A loud ringer would great too... but if
> the best phone doesn't have one, I'll get an auxiliary ringer.
> 	Does anyone have a phone model that they find to be excellent in a
> louder than usual data center?

Old-school ITT Cortelco 2500 (desk) or 2554 (wall) set.

Replace microphone element with noise-canceling microphone.  Best one is 
Roanwell Confidencer available from Mike Sandman, Graybar, etc.  Also 
good is Walker - Clarity NoiseCensor or Allen-Tel GB117 (available from 

For exceptionally loud areas, an amplified handset such as Allen-Tel 
GBG6M-44 as well.

The noise-canceling microphone is the key.  It will help you be heard at 
the other end and kill the noise in the sidetone to you.  Works wonders. 
   The 2500 desk phone has a dual-gong mechanical ringer, loud and 
distinctive.  2554 wall model is single gong, still fairly loud.

Google for suppliers of these items if you aren't near a Graybar.

Jay Hennigan - CCIE #7880 - Network Engineering - jay at
Impulse Internet Service  -
Your local telephone and internet company - 805 884-6323 - WB6RDV

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