• Digital Operator/Feature Phone Set. 
• Comfort and rapid use with the handsfree, handset and headphone options. 
• 16 double function, programmable keys with embedded LEDs for monitoring the status of the assigned extensions / lines.
• 6 special functions keys (menu, park, phonebook, flash, transfer, and redial) that allow easy access to the frequently used features. 
• 4 volume control keys (handsfree, volume increase and decrease, mute).
• 160x100 pixels (8 lines x 26 Characters) 4” graphic display with backlight.
• Adjustable display at 5 level
• Flexible use with 4 soft menu keys.
• More keys with DSS unit for easily accessing the the extensions / lines / features assigned and for monitoring the extensions / lines (optional)
• Ease of operation with the headphone input, special menu structure allowing control over call parking and retrieval of parked calls.
• Incoming, outgoing, missed and answered calls list
• Displaying the names of callers recorded in the phonebook and Idea. 
• Memory for storing 50 calls. 
• Menu structure that may be used easily by the display. 
• Using in integration with Net Console computer-telephony integration (CTI) application

 Optional Features:

• Bluetooth® V2.0+EDR class compliant. 
• Operation in 2.4GHz ISM band. 
• Coverage area of 10 meters outdoors, and 5 meters indoors. 
• Detection and pairing with Bluetooth® devices and storing up to 15 Bluetooth® devices in the memory. 
• Detection and pairing with ST30 by the Bluetooth® devices. 
• Entering Bluetooth password, setting up whether it will be visible for other devices, configuration of the name that will be displayed to other devices. 
• Answering and ending calls using the special key on the standard headset with Bluetooth® support. 
• Pairing ST30 with GSM phones with Bluetooth® support. 
• Accessing the phonebook of the GSM phone with Bluetooth® support via ST30 (This feature may only be used if it is supported by the GSM phone). 
• Answering calls received by the GSM phone with Bluetooth® support via ST30. 
• Making GSM calls via GSM phone with Bluetooth® support using ST30.