Switched 4 wire digital service or dedicated 4 wire digital service. May also be used as Limited Distance Modem in point to point applications. Responds to Bell defined CSU and DSU loop backs from the Central Office. Internal pattern generator. Both V.35 and RS-232 connectors provided.
Signals are present at both connectors regardless of data rate.
Bipolar return to zero. Automatic, no user adjustment needed. Ten front panel status and test indicators. Responds to Bell defined CSU and DSU loop backs from the Central Office. Internal pattern generator.