The Siemens OpenStage 40T features 5 way navigation keys, 7 fixed function keys and 12 LEDs for key signalling.
The OpenStage 40T is ready for use with a headset, has an integrated duplex speakerphone and can support additional programmable keys (AOMs) and CTI.
This model is compatible with Hipath 500, 3000, 4000 and can be used as a TDM telephone.