To ease the work load for all those who need to manage a lot of telephone numbers and require access to many features and functions. The STE 40 System Phone Expansion unit features 30 freely programmable buttons with LED indication.

Busy extensions are seen at glance and therefore the unit will assist in the speedy connection of calls. This will eliminate unnecessary waiting times for callers and reflects a professional call handling. The STE 40 can only be used with the ST 13/ST 40 System Phone. A maximum of 4 Expansion Units can be connected to one ST 31/ST 40. The total number of STE 40's which can be connected system wide is depending on the relevant telephone system used.

NOTE: Only use with appropriate system firmware. A P 400-1 or P 400 IT processor unit is also needed for use with AS 40 P, AS 4000 and AS 100 telephone systems.