Here in ZL the line voltage (nominally 50) is reversed behind the low freq ringing as well- lotsa PBXs use the line reversal these days and not the actual low freq ringing signal- makes for faster ca
Well In Pennsylvania Verizon The ring freq consists of 5 tones to handle 5 party lines and or 10 party reverse side ringing ( No more ,,,not sure if we have any other than 2 party lines ) 16, 25, 33,
Have you actually looked? Yessir... I'm in the telcom equipment business. I'm not claiming that you're wrong, Larry... just that the normal U.S. ringing signal is plain old 20 Hz AC. John Andrews, W
Larry, I'm with John Davis on this one. The U.S. practice is 20 Hz for ringing -- nothing at 1 kHz. John Andrews, W1TAG Larry, I have done. My statement was based on having checked it personally on a
<< both these are wrong. Go and get a scope and have a look. >> Larry, I have done. My statement was based on having checked it personally on a number of Bell and non-Bell exchanges over the years. A
Gentlemen: Same in the UK and both these are wrong. Go and get a scope and have a look. The proper designation of ringing induction from CO to Callee (a telephone term differentiating Caller [the ori
Same in the UK. Ring voltage is a low frequency bipolar spike waveform of a 100V or so amplitude, Originally designed to hit the bells firmly, the waveform seems to have been kept for legacy reasons.
