Adtran Atlas 800 Series Modem-16 Module 1200181L1 Switches The Adtran 1200755E2 provides four

The Adtran 1200755E2 provides four T1 or PRI interfaces to an Adtran Atlas 550

The 4200305L2 combined two T1/PRI interfaces and four ISDN BRI U interfaces to  convert T1/PRI signals to ISDN BRI signals

The multiplexer cards on the 4205290L10 include a V

the voice switch can interface to analog trunks via loop start or wink start signalling

DB9 port for configuration and consoling of the switch

Adtran Atlas 800 Series Modem-16 Module 1200181L1 Switches The Adtran 1200755E2 provides fourAdtran Atlas 800 Series Modem 16 Module 1200181L1 Description: The Adtran Atlas 800 16 analog modem module is designed for use with the Atlas 800 series. The card provides no external facing ports, instead providing 16 internal analog modems. The modems of the 1200181L1 can process up to 16 analog dial backup calls for disaster recovery. The 1200181L1 can handle up to 16 V. 90 modem calls and 16 ISDN B Channel calls for dial up. Those who want to use