subscriber line
1. Synonym loop.
2. A communication channel between a telephone station, PBX or TWX station and the central office which serves it. Synonym exchange line. [47 CFR Pt.36-A]
1. Synonym loop.
2. A communication channel between a telephone station, PBX or TWX station and the central office which serves it. Synonym exchange line. [47 CFR Pt.36-A]