i thought it was 56 not 90 Jaime Solorza Wireless Systems Architect 915-861-1390
On Wed, Nov 11, 2015 at 8:45 AM, Chuck McCown <[email protected]> wrote: > Electrically speaking, back in olden times of party lines etc, the ringer > in the phone was connected between the ground and Tip or Ring. So each > phone had a red, green and yellow wire. Two wires were not good enough. > You needed the yellow ground wire or the ringer would not work. On a two > party line, one ringer would be on tip to ground with the other ring to > ground so each party only heard their own ring. There were other methods > of making you only hear your own ring as well, frequency selective ringers > were a popular method. > > With the ground wire broken and connected to the dog, the 90 VAC 20 Hz > ringing current had to pass through the dog for the phone to ring. > > Two wire phones in use today use what is called bridged ringing where the > ringer is connected to tip and ring. > > But I will bet that if you connected a phone or a ringer from ring to > ground it would still ring. >
