# Phone Model M3820

When you connect a Nortel Meridian M3820 phone to a 3300 CITELlink Gateway and program it as a CITELlink Type2 device, the phone supports the following keys:

Button Label | Function
1 | Cancel
2 | Hold
3 | Mute
4 | Handsfree
5 | Prime Line
6 | Unused
7 | Prime Line
8 | Feature Key 2
9 | Feature Key 3
10 | Feature Key 4
11 | Feature Key 5
12 | Feature Key 6
13 | Program
14 | Menu Right
15 | Menu Middle
16 | Menu Left
17 | Down Arrow
18 | Transfer/Conference
19 | Superkey
20 | Message
21 | Message Indicator Light