Pretty much what we were trying to blow down Pac-Bell's lines in the heyday of tone and dry pairs. The problem was how excessive distances would not perform 100% in critical services even though the telco lines were "in spec".
Tone Remote lines are where I learned about/how the original analog (silver box) Motorola Tone Decoders (with lumped LC circuits) would easily out perform the Vega solid state (using op amps). A clearly demonstrated example of how active circuits were not an improvement over the original lumped analog design. One unforgiving telephone line into a lower spec or dynamic range tone decoder is enough to make a system problematic... ie the customer not happy or angry. cheers, skipp > Dan Blasberg <[EMAIL PROTECTED]> wrote: > > Most of the radio circuits that i remotely test and we (Verizon) > engineer are 0, -16 circuits, meaning that the from the telecom > interface we are looking for a 0db signal on the transmit side, and > when it gets to the other end at the interface card at the station the > signal will be -16 db. > > Dan > > KA8YPY > > On Apr 26, 2007, at 10:40 PM, allan crites wrote: > > > Tim, > > The AT&T spec for line loss from the sending end to the central office > > is 9 +- 1 dB and from the central office to the receiving end is 9 +- > > 1 dB. So your total loss will be 18 +- 2 dB. > > I need to find my tone remote manual to get the answers to your other > > questions. > > WA9ZZU > > > > "Steve Bosshard (NU5D)" <[EMAIL PROTECTED]> wrote: > >> I believe 16 db would be terribly excessive loss for a line - maybe 6 > >> db tops. I usually set -10 dbm @ 1000 hz for +/- 3 khz deviation. > >> ). 0 dBm for max deviation. and let the tone levels fall into place > >> as you have indicated. If the line measures 6 db of loss @ 1000 hz, > >> you may want to move the hold tone from -20 dBm to -17 or -14 dBm and > >> the remainder accordingly. Also loss may vary with tone frequency, > >> so loss at 1000 hz may be far different from loss at 2175 hz. Best > >> luck, Steve NU5D > >> > >> On 4/26/07, tim_shephard <[EMAIL PROTECTED]> wrote: I'm working > >> with a GE repeater, Master II. Its tone remoted. It is > >>> setup and working, but I'd like to know how to set the tone remote > >> > >> > >> -- > >> Ham Radio Spoken Here.....NU5D > >> Nickel Under Five Dollars > > > > >
