ATLAS 550 (AC - Base ATLAS 550 Unit for TDM, ISDN and Frame Relay applications. Accepts 2 network interface modules - one T1-PRI network interface module is included and 4 user interface modules. Also includes 10-100 Ethernet interface, a single AC power supply and 1 RJ48-RJ48 cable - 15 feet)
ATLAS 550 Network Interface Module (Provides a Single T1, PRI or DSX-1 Interface. Includes 1 RJ48-RJ 48 Cable - 15 feet and 1 RJ48-RJ48 Crossover Cable - 15 feet.)