ESI E1 612 Port Expansion Card Phones Adtran 4210912L1 Features:

Adtran 4210912L1 Features:

Also provides low-current feed to light the message waiting lamp on telephones equipped with the Message Waiting feature

and 8 relay ports are included standard

Cisco WS-C2960-24PC-L Features:

ESI E1 612 Port Expansion Card Phones Adtran 4210912L1 Features:ESI E1 612 Port Expansion Card Description: The ESI E1 612 is a first generation port expansion card for IVX 128 phone systems. The ESI 612 adds 6 analog trunks (FXO) and 12 digital extensions (FXS) to a system. The E1 612 is compatible with ESI E Class, X Class, and IVX128 phone systems. The ribbon cable to connect the ESI 612 port card to the phone system is included. ESI E1 612 Features: Adds 6 CO lines to systems Adds 12 digital extensions to