Adtran Atlas 550 Dual X.21/V11 USSI Module 4200754L3 Multiplexers ringing or holding

ringing or holding

Any T1/PRI port can serve as timing source for the ATLAS 550

a speakerphone button

The 1200291L1 is a breakout patch panel for DSX-1 deployment

the Dell 5548P can be stacked through 10GbE interfaces and the switch supports uplinking through 10Gb ports

Adtran Atlas 550 Dual X.21/V11 USSI Module 4200754L3 Multiplexers ringing or holdingAdtran Atlas 550 Dual X. 21 V11 USSI Module 4200754L3 Description: The Adtran Atlas 550 Dual X. 21 V11 Universal Synchronous Serial Interface (USSI) Module (4200754L3) combines with other Atlas 550 components to provide solutions for a variety of wide area networking applications. The 4200754L3 provides a pair of X. 21 V11 serial ports. Adtran 4200754L3 Features: Provides two X. 21 V11 synchronous serial ports Each module supports one interface type