digital channel capacity. Pairgain - The term "pairgain" is used for any piece of equipment that will allows multiple voice channels to leave the CO as T1. It then terminates on a piece of equipment out in the field that will take that T1 signal and use the 24, 64 kbps DS0 channels for voice applications. POTS - Plain Old Telephone Service. Regular old-fashioned analog loop start phone service. Repeaters, Boosters
