Multi-interface unit designed for use with TOA’s packet intercom system (IP network-compatible intercom system) that employs packet audio technology. Connecting the multi-interface to a local area network permits ideal system for in-house or wide-area information transmission applications, such as paging, periodical broadcasts, and background music broadcasts, to be built between multi-interface and IP intercom exchange or other multi-interface unit. Contact bridge function can be realized through contact input and output control. Also features tie-line function to be connected EXES-2000 intercom system or EXES-6000 system. Total of up to 80 multi-interface units and IP intercom exchanges can be connected to network. Unit can be mounted in an EIA standard rack (1-unit size) or to wall using the supplied bracket.