Central IFB electronics station. Contains all necessary control functions and electronics including line power, to provide the active link between the 4001, 4002 and 4003 control stations and the 4030 and IFB-325 user stations.

The IFB-828 interfaces up to eight RTS IFB-325 or 4030 IFB beltpacks to any RTS Digital Matrix Intercom system, and it provides power to the beltpacks. The IFB-828 may also be used as a simple program interface to feed two separate program sources to each of eight or 4030 beltpacks (16 program sources to eight beltpacks total).

The 4030M passive single channel IFB earset station. The 4030M has no powered electronics and connects to a matrix port output. The 4030M features a volume control and has a mono ?" jack for the earset and an XLR-3F balanced audio input. The 4030M is intended for use in conjunction with an RTS Digital Matrix Intercom system.

The IFB-325 is a listen only IFB earset station with one channel. The IFB-325 provides a mono (either interrupt or non/interrupt selected at 4010) audio signal to the user. The IFB-325 features volume controls in an extruded aluminum case. For earset options, see the Earsets section of the Telex Intercom Headsets website.