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/ _______________________________________________ VoiceOps mailing list VoiceOps at voiceops.org https://puck.nether.net/mailman/listinfo/voiceops
On 09/08/2015 04:00 PM, Carlos Alvarez wrote:
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.
That makes sense. I'm not sure how "tall" the doughnut created by a typical DECT base is. What I do know is that in both office buildings where I've used my Platronics headset, I can go about two floors down and gain considerable lateral distance without issue. The point about concrete and rebar is a good one. It makes me wonder what ticky-tacky this office building's composed of! -- 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/
On 08/09/15 21:12, Alex Balashov wrote:
That makes sense. I'm not sure how "tall" the doughnut created by a typical DECT base is.
What I do know is that in both office buildings where I've used my Platronics headset, I can go about two floors down and gain considerable lateral distance without issue.
The point about concrete and rebar is a good one. It makes me wonder what ticky-tacky this office building's composed of!
You need to survey. Anything more than one room. I've been to 100m by 50m warehouse, installed 4 gigaset C475IP (predecessor to N300IP) which were just on a shelf above the comms cabinet in an office in the middle. The phones worked perfectly everywhere. We were expecting to at least have to mount the bases on the office roof. Equally we've been to places with just a couple of rooms where repeaters or roaming dect (multi base) have been needed. Infact I installed a Gigaset N510 and 2 RTX repeaters into a (very) large house recently. It didn't strictly need 2 repeaters, but 2 repeaters meant the base station could be more easily accessible if you need to get to it. The hand off is perfect, and we go to every corner. The same house has 8 unifi base stations to get wireless to all the corners. The wifi always dropped while travelling in the lift. Dect perfect all the way. 6 phones, 4 SIP accounts, low usage. I appreciate that this makes it hard to tell the customer what they need to buy. Roaming dect kit is more expensive. And if you don't need repeaters, multiple small bases usually cheaper than 1 big base. Tim
participants (3)
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abalashov＠evaristesys.com -
caalvarez＠gmail.com -
tim＠kooky.org