Apr 11, 2007 #1 H halt Junior Member level 2 Joined May 30, 2005 Messages 20 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,442 Telephone line Hello does someone knows what is the exact voltage and current in the simple téléphone line ?
Telephone line Hello does someone knows what is the exact voltage and current in the simple téléphone line ?
Apr 11, 2007 #2 S servicemann Banned Joined Jan 20, 2006 Messages 72 Helped 10 Reputation 20 Reaction score 4 Trophy points 1,288 Activity points 0 Telephone line Internal resistance of telephone line depens on the distance from the phone central. Voltage varies from 48 to 60V for open circuit. When you pick up the phone, there is usualy about 6V per say 10mA.
Telephone line Internal resistance of telephone line depens on the distance from the phone central. Voltage varies from 48 to 60V for open circuit. When you pick up the phone, there is usualy about 6V per say 10mA.