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it also adds new features
Adtran Atlas 550 PRI Channel Bank 4200305L7 Description:
Switch Fabric Capacity: 232 Gbps
These modules provide the ability to uplink CX4
Shoretel ShoreGear SG 220T1A Voice Switch
Adtran Atlas 550 Quad T1/PRI Module 1200755L1 Phones it also adds new featuresAdtran Atlas 550 Quad T1 PRI Module 1200755L1 Description: The Adtran 1200755L1 provides four T1 or PRI interfaces to an Adtran Atlas 550. Each port can be configured to work as a T1 or PRI. The 1200755L1 offers support for Drop Insert and 1 0 digital access cross connect systems (DACS) applications. The quad T1 PRI module supports PRI switching and frame relay emulation. Adtran 1200755L1 Features: Can be used in any user interface module slot
