- Cortelco 7 series 4-line telephone multi-purpose feature module - Can be utilized to provide any one of three features for 2740/2750 systems: music on hold, external paging or for door monitor - Music-on-hold can be provided by connecting to various music sources such as tapes or MP3 players to provide background music or announcements to callers on hold - To provide paging, connect the device to a paging amplifier and drive an external paging speaker - Can be paged from any phone in the system just by using its station number - Can be set to accept or reject all pages - Multiple modules may be connected to drive more than one speaker - When connected to a door monitor the phone will alert the user when the doorbell is pressed, allowing intercom conversation with the door monitor - Capability to operate a magnetic door strike enabling the door to be opened from the telephone dial pad ITT2743