Adtran Atlas 800 Series Quad USSI X.21/V11 Module 4200261L3by Adtran
Atlas 800 Series Quad USSI Module, X.21/V.11 4200261L3 Description:
The Adtran 4200261L3 provides four X.21 universal synchronous serial interface (USSI) connections for an Atlas 800 series gateway. The module supports Nx56/64 Kbps operation for up to 2.048 Mbps operation across each of the 4 ports. The Adtran 4200261L3 can support both frame relay emulation and passthrough in an Atlas 830 or 890.
Adtran 4200261L3 Features:
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