Technical data

* all values in non-tilted position of display and lowest position of feet
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Dimensions* and weight
Dialog 4220 Dialog 4222 Dialog 4223 Dialog 4225
Lite Office Professional Vision Key panel
Length (mm) 231 231 231 234 226
Width (mm) 159 159 204 240 64
Height (mm) 102 102 102 102 90
Weight (g) 627 670 837 978 222
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Dialog 4220 Dialog 4222 Dialog 4223* Dialog 4225
Lite Office Professional Vision
Graphical Display (pixels) – 128x25 240x39 320x80
Tiltable display n/a – • •
Programmable Keys 5 5 7 17
LEDs 12 13 13 23
Navigation keys – – – 3
Soft-keys – – 4 4
Line access 2 2 2 2
Inquiry Key 1 1 1 1
Transfer key • • •/softkey** •/softkey**
Clear function • • • •
Headset Key – • • •
Message-Waiting indicator • • • •
Mute function/Silent ringing • • • •
Loudspeaking • • • •
Hands-free Speaking – • • •
Connection for extra
key panel – 1 4 4
Volume control • • • •
Programmable Ringer
volume and tone character • • • •
Option unit Connection – • • •
Adjustable console base • • • •
Wall mountable • • • •
A concise comparison of Dialog digital phones:
* Converts to an operator's terminal with one key
panel when used together with MD 110 Evolution.
** Softkey in MD110 BC12, ELU28 R3A line board
Operator features
The table below shows the Operator features of the Dialog 4224 Operator in
BusinessPhone and MD110 respectively. For the MD Evolution system platform, the Dialog
4223 and Key Panel Unit is used as the operator terminal:
Features Dialog 4224 Dialog 4224
Operator for Operator for
BusinessPhone MD110
Graphical display ••
Tiltable display ••
Key Panel Units 4–
Function Keys with LED’ s 19 19
Dial by name/speed Dialing 3–
Hearing Aid compatibility ••
Dynamic soft keys 4–
Option unit support • • (for extra bell only)
Hands free speaking (AEC) •–
Loudspeaking •–
Programmable ringer,
loudness and tone character ••
Large traffic keys ••
Large speech keys with LED ••
Mute Function ••
Headset function key ••
Volume control ••
Active hook switch •–
Adjustable foot console ••
Acoustic chock protection ••