Digital signal level two. One 6.312 Mbps channel, equivalent to 96 voice grade lines, each with 64 Kbps capacity.
Digital Signal, Level 2 is the North American data rate used for T2 carriers. It operates at 6.312 Mbps and supports four T1 lines or 96 phone calls
Digital Signal 2 : 6.312 Mb/s , which can transport 4 DS1's asynchronously.
Digital Signal 2: Four T1 frames packed into a higher level frame transmitted at 6.312 Mbps.