Tieline Technologies



Note: this accessory has been Recently Retired. Please contact Tieline or your Dealer for more information.


X.21 Front View

This module is required for making connections over the X.21 Leased line Transport

Simply plug the module in a Free expansion port on your Tieline codec and you are away.


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) A network adaptor cable may be used for conversion to V.35 protocol. Contact Tieline for more info.

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