Adtran Atlas 550 Dual X.21/V11 USSI Module 4200754L3 Conference Phones These hold up to a

These hold up to a total of 56 hours of voicemail storage

The Adtran 1202289L2 is an DC power supply for the MX2800 multiplexer

The Dell PowerConnect 3400 series of switches are stackable through these Gigabit ports

the gateway contains several ports and features that provide a multitude of connections

Bandwidth for the HSSI interface can come from individual T1s or a T3

Adtran Atlas 550 Dual X.21/V11 USSI Module 4200754L3 Conference Phones These hold up to aAdtran 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