DS is a specification level for DDS lines. A T1 is a DS-1 or 1.544 Mbps: a single channel fractional T1 is a DS-0 or 64 Kbps.
DS is a specification level for DDS lines. A T1 is a DS-1 or 1.544 Mbps: a single channel fractional T1 is a DS-0 or 64 Kbps.