The AT&T Spirit 616 expansion module adds an additional 3 line and 6 telephones to the Spirit 308 control unit. Their is also a third accessory jack for answering machines, modems, and fax machines.

This is an expansion card is for the Spirit 308 phone system only to upgrade your system from 3 lines and 8 stations to 6 lines and 16 stations (6x16).

2 Year Warranty