# Phone Model M3904

When you connect a Nortel Meridian M3904 phone to a 3300 CITELlink Gateway and program it as a CITELlink Type1 device, the phone supports the following keys:

Button Label | Function
1 | Cancel
2 | Hold
3 | Quit
4 | Handsfree
5 | Mute
6 | Headset
7 | Program
8 | Message
9 | Unused
10 | Directory
11 | Previous
12 | Transfer/Conference
13 | Shift
14 | Unused
15 | Copy
16 | Next
17 | Unused
18 | Prime Line
Shift + 18 | Personal Key 7
19 | Feature Key 2
20 | Feature Key 3
21 | Message Indicator Light
22 | Feature Key 4
23 | Feature Key 6
Shift + 23 | Superkey
24 | Feature Key 5
Shift + 24 | Down Arrow