Adtran Atlas 550 Quad ISDN BRI U Module 1200315L1 Routers The Adtran 1202288L2 is a

The Adtran 1202288L2 is a controller card for the Adtran MX2800 M13 multiplexer

and YY741 stacking modules are supported by the switch

each programmable button can be set up as additional features instead

2 but less than version 5

The Inter-Tel Axxess 550

Adtran Atlas 550 Quad ISDN BRI U Module 1200315L1 Routers The Adtran 1202288L2 is aAdtran Atlas 550 Quad ISDN BRI U Module 1200315L1 Description: The Adtran 1200315L1 provides 4 ISDN U Interfaces for User Termination applications. The Quad ISDN BRI U module supports AT&T 5ESS, Nortel DMS 100, and National ISDN 1. The Adtran 1200315L1 is compatible with Atlas 550 gateways. Adtran 1200315L1 Features: Provides four BRI S T interfaces Supports: AT&T 5ESS Nortel DMS 100 National ISDN 1 Can only be used in a user interface module slot.