•Key Lock: locks the keypad to prevent accidental dialing with a long press of the # key (Key Lock can be activated automatically if enabled through the local menu.). Key Lock is temporarily disabled when a call arrives. To unlock the keypad, press the 
softkey and then press #.
•Multiple Ringer Settings:
-30 fixed melodies, with various ring tones
-full melody, single ringing burst or chirp for all incoming traffic
-enable or disable the ringer and trembler
•Selectable Volume: 7 levels.
•Auto Key Lock: disables the handset keys to prevent accidental dialing. If the Auto Key Lock is enabled, the handset activates the key lock function automatically if you don’t press any key for 1 minute in idle state.
•Key Click: enables or disables an audible click for each key press.
•Alarm Set: sets an alarm reminder in hour:minutes
•SOS Number: dials a
•Auto Answer: automatically answers incoming calls that ring at the handset. You need a headset connected to the handset to use this feature.
•Silent Charging: disables the OP27 while it is charging. Typically, you use this feature if your Mitel IP Phone has been associated (programmed into a suite on the 3300 ICP) with your OP27 phone. Then, while your phone is charging, calls to your extension will ring your Mitel IP Phone. Note that Suite Services is a feature of the 3300 ICP. Check with your system administrator to see if this feature is enabled on your system.
•Range Warning: provides 4 short beeps whenever you move out of range of the system. When you are out of range of the system, your OpenPhone 27 handset will not function. If you hear the 4 short beeps, move back into range by getting closer to a Radio Fixed Part (RFP).
•Volume Setting: sets the volume of the handset earpiece, loudspeaker, and headset during the call. You can only set the volume while on a call. To set the volume (7 levels), long press
the up or down arrow keys 
.
•Time: displays the 3300 ICP system time.
•Contrast: adjust the contrast of the handset display.
•Languages: changes the display language. A maximum of 8 languages are supported: Dutch, German, Italian, English (default is English), French, Spanish, Swedish, Finnish.
•Headset: supports a standard 2.5 mm jack to connect a headset (inline hook switch supported).
Contacting Emergency Services
This handset, like any wireless phone, communicates over radio signals. As with any wireless phone, you may not be able to establish a connection under all conditions. Therefore, you should never rely solely on a wireless telephone for essential communication (for example, in medical emergencies).You can program an emergency number into the SOS key on your handset (see Using the SOS Key on page 15).
The Key Lock feature disables the handset keypad and prevents the accidental dialing of numbers that could result in nuisance calls. It also prevents accidental calls to emergency services numbers (for example 999, 911 or 112).
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