telcom wiring question need help i ve got two lines coming into my apartment two different telephone numbers when i ordered the second line installed instead of bringing out another wire bundle the telco just connected up to my yellow and black wires so i have one line on red green and the other on yellow black today i was monitoring the voltage on both lines i had a voltmeter across the red and green and read back volts i then lifted up the receiver on my second line black yellow wires the voltage dropped to volts on the first line red green wires i repeated this experiment with the second line monitoring black yellow and lifting the handset off the cradle on the red and green line it also dropped to volts why is this i thought these were separate lines next i went to the block and disconnected the blue and white lines coming in from the telco cable i then disconnected all the phones in my apartment and went back to the block and did some resistance measurements both lines read open i ll appreciate any help on this is this considered normal guy urbina urbina novax llnl gov
