[VoiceOps] WiFi SIP phones recommendations

Carlos Alvarez caalvarez at gmail.com
Tue Sep 8 16:00:07 EDT 2015

You can't compare home range with commercial range.  Many commercial
buildings have far more challenging environments as far as noise and
blocking surfaces.  Going from one floor to another is always worse than
horizontal range for a variety of reasons.  For example, antennas are
generally oriented to spread signal horizontally, but not vertically.  The
higher the dB gain, the more true this is.  My best guess is that a DECT
base probably has a 3dB antenna, which means 3dB more power to the sides as
to the top.  Every 3dB is a doubling of the power, because it's a
logarithmic scale.  Most commercial buildings employee concrete/rebar
between floors, unlike the simple wood in most homes.  Both of those are
terrible for radio signals.

I've covered single-story 2k square foot restaurants with DECT, but they
could barely make the phone work when going next door to their offices in
another suite.  In a commercial office environment I've found that roaming
floors with DECT was a total failure.

> On Tue, Sep 8, 2015 at 12:49 PM Alex Balashov <abalashov at evaristesys.com>
> wrote:
>> On 09/08/2015 03:35 PM, Carlos Alvarez wrote:
>> > The challenge with DECT is that "range" is relative to a single base
>> > station/AP versus roaming between base stations/APs.
>> Also: just how much range do you need in a restaurant, unless the
>> restaurant in question is the residence of Sheikh Mohammed bin Rashid al
>> Maktoum?
>> You and I both have Plantronics CSxxx DECT headsets and the range is
>> very impressive. In my case with the CS540, I can straight-up leave the
>> building, on whose third floor my office is situated, go through the
>> parking deck, and take a walk up the road without any degradation.
>> -- Alex
>> --
>> Alex Balashov | Principal | Evariste Systems LLC
>> 303 Perimeter Center North, Suite 300
>> Atlanta, GA 30346
>> United States
>> Tel: +1-800-250-5920 (toll-free) / +1-678-954-0671 (direct)
>> Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
>> _______________________________________________
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