G3 X.21 Module - This module will support X.21 leased line mode with C/DTR call establishment over 64-384 kbps connections . The connection profiles supported are mono, dual mono stereo and joint stereo. Choose from G.711, G.722, MPEG 2 Layer 2 and Tieline Music Algorithms (Tieline Music is capable of 15 kHz mono or stereo over 64kbps or 128kbps with 70ms delay) Tieline MusicPLUS is capable of 20kHz Stereo at 96kbps) A network adapter cable may be used for conversion to V.35 protocol. Contact Tieline for more info.