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The DTMF [Dual Tone Multi Frequency] tone dialing system operates on Direct Current [DC] and is DEPENDENT ON the PROPER POLARITY of the two phone conductor wires!!!!
IF the polarity is reversed, ONLY the PULSE DIALING WILL WORK!!!!!
USUALLY the Tip and Ring wires are colored Red and Green [I think -- it's been a lotta years!!!!!].
HOWEVER, color really doesn't matter as USUALLY ONLY TWO WIRES ARE CONNECTED TO THE PHONE SO REGARDLESS OF COLOR, JUST REVERSE those two wires.
Try reversing the two wires, and then switch the phone to tone dial and try it. That MAY solve the problem!
If that doesn't solve the problem then it's beyond me!!!!!
Since you declined to specify the model of your VTech 5.8GHz phone, I can only suggest that you enter it into the search box here to download a copy of the manual. The manual will describe how to switch between pulse and tone dialing.
try reversing the polarity in the phone jack.[ reversing the red & green wires] the phone company may have been doing some work in your area. but first check to see if the phone is set on touch tone when it may need to be on pulse.
good luck
wg
Lisa,
If the 900MHZ phone is Model 26928M programming for rotary dial usually goes like below, can't hurt to try on any model.
TONE/PULSE DIALING
This adjustment allows you to select tone (touch-tone) or pulse (rotary) mode dialing. The phone is pre-set for
touch-tone use. To set to tone or pulse dialing:
1. Press and hold the program button for two seconds. You will hear a beep.
2. Press the *tone button to select Tone Dialing or press #pause to select Pulse Dialing.
3. Press the program button again. You will hear a confirmation tone.
You can download the manual from the link below:
http://www.uniden.com/pdf/TRU448-2om.pdf
To set tone dialing see picture below:
Please update the question & let us know if the information given was useful to you - Good Luck!
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