STENTOFON's 9400 system is designed for security and correctional applications. The 9400 has two-talk channels, allowing a security officer to speak to someone calling in and speak to a remote guard simultaneously. The Master station is a compact, advanced station featuring a 2 x 16 character alphanumeric display with backlight, full-keypad, answer next key, scroll key and an optional control key. The system audio is simplex with the audio direction controlled by the master.

The station’s two-line display gives full information on the current conversation and calls waiting in queue. The information includes the station number and name or location. The Answer Next in Queue key allows you to respond to the next call with a single push of the button.  The Scroll Key allows viewing the queue and changing the priority of the Answer Next function. The station can be ordered with an optional handset mounted for private conversation.  The card rack IMCR provides the motherboard and card positions for installing one of the 9440 control boards and up to 10 of the 9450 line boards. This allows a configuration of up to 100 line positions within one rack module. All wire connections to the rack are by removable connectors for ease of installation.