Mitel SX-20 Miscellaneous Card II 9102-005-006-NA

4 push-button telephones. Supports music on hold. Has paging circuitry. Has Power Fail Transfer circuits (2). Allows 2 telephones to operate without commercial power.

Accepts up to 4 trunk modules for 2 way call conferencing. (Part # 9102-11-XXX-NA)

Compatible with the SX-20 system.