At 12/27/2011 09:10 PM, Gary Garrett wrote: >The ringing current from the Telco to the base unit is 120 cycles per >second AC. >It would be more like AC hum on a sound system.
Actually it's a 20 Hz near-square wave, 90 volts nominal. It is thus much, much more powerful than the talk voltage, since it supplies the power to up to five "ringer equivalence" bells (REN=1 on mechanical handset bells of the early 1970s). >I would bet the 2.4 phone system is using most if not all the band at >pretty low power. >Probably it is the wake up and setup for a call that is knocking out the >ISP not the ringing its self. Some 2.4 GHz phones are analog, some are narrowband digital, and some are wideband/spread spectrum digital. But of course the signal from the base to the cordless handset is just a digital message, not a major power shift like on an analog loop. I'd suggest first finding out the model of the phone and if it is 2.4 GHz, replacing it. Putting phones there was a dumb idea. (900 MHz really was better than 49 MHz. Thus they convinced the public that the more Hertz, the better. So they went to 2.4 GHz, and then 5.8, before settling on DECT at 1.9 GHz, reserved for the purpose.) >On 12/27/2011 5:56 PM, Josh Luthman wrote: > > What about from the copper pair to the handset? > > > > Josh Luthman > > Office: 937-552-2340 > > Direct: 937-552-2343 > > 1100 Wayne St > > Suite 1337 > > Troy, OH 45373 > > > > > > -- Fred Goldstein k1io fgoldstein "at" ionary.com ionary Consulting http://www.ionary.com/ +1 617 795 2701 -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
