Telephony: Minimum Loop Current on an Internal Telephone Line (FCC Specifications)
Posted on 2006-10-29
Does anyone know if there are any FCC regulations specifying the minimum loop current on a telephone line. I am referring to the off hook current the is supplied to the telephone/fax by the carrier down the telephone lines. FCC part 68 specifies that the loop current should not exceed 100mA and there is reference to a minimum of 20mA, but I am not sure about this.