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Have you ever attempted to make a phone call on a 18D Phone and find yourself listening to the radio station next door???
I've have attempted anything that i could think of with no resolution, changed port on system, changed pairs going to phone, installed filters, difrent phones, difrent cables.
The radio station that the phone will pickup changes with the position of the handset and it will sound the same even with the voice path disconnected (4,5 on the jack), it apears to be induced directly in the phone, when moving the phone around the office i noticed that the intensity of noise will change. It is a little dificult to explain to a lawyer why he has to stand on one leg, with his arms in the 7 and 3 oclock positions to get clear reception on his phone Any ideas would be greatly appreciated. Thank you in advance.

The signal is being demodulated by the telephone set itself, but the wiring is serving as the "antenna". Since you have tried filters, I would try shielded wiring and make sure the shield is properly grounded at the equipment end.

[This message has been edited by BillyBob (edited April 08, 2004).]

Just a guess, a line cord with "doughnut" ferrites might help, and as a complete experiment, aluminum foil pressed into the inside of the bottom skin??? Maybe a Capcitor on the cross connect?
OR market it as a Lawyers special set, or an exersise phone!

We tried to put an old analog Voadvi in an AM station once and you could hear the radio station over the speakers in the phone without them even being plugged in. We had to swap to a Norstar CICs and install filters on the lines. We also had to re-run the cables and keep them as low to the ground as possible, around baseboards and such. It was'nt pretty and we did'nt receive 100% success knocking out the RF but it is functional.

you could blow up the radio station next door.

Perhaps you could get some assistance from the radio station engineer. They should take partial responsibilty for this problem because it is there signal causing the problem. Right?

Thank you all for great sugestions, I espetialy like the one about blowing up the radio stations , I think that in the end will have to put in another system, posibly strata ctx 100 or a merlin magixs.

Thanks, Tom.

I've had this issue twice. Both times the audio was coming in from the lec and a radio station was nearby. Problem was reported to the lec and was cleared the next day.

Most of the time the RF signal is being picked up through the handset cord.
The RF field is strong enough that it will cause the audio circuits within the handset/speaker circuits to act as a diode and become a reciever for the audio.

See if you get the music when you are using the speaker when making or recieving a call.

If you get it with the speaker then the RF signal is so strong that it is swarming the audio circuits within the phone itself.

If this is an AM station using a .01 ufd. disc capacitor rated at 50 Volts placed across the receiver within the handset or across the speaker terminals within the set may help. If it is FM that may take some more or less capacitance depending upon the frequency of the station.

DJ

The radio stations are induced directly in the phone and we are not going to go as far as to modify it, the transmiters are located on the Empire State building in New York and i don't think that anyone there will be interested with a complaint that their stations are pumping out too much power . Thanks again for the sugestions.