2.2. Function keys & codes
Telephone settings 
.
to switch into the headset mode.
.
, 
or 
.
.
to access the phone book.
to show the “virtual keys”.
.
/
.
icon . Press 
to disable both indicators. 
key or the soft key Call. The active call is now placed on “hold”.
icon on the key in the information section indicates the line, on which the call is on hold.
or tap 
on to activate the speaker, if necessary.
to place all parties on hold.
.
. The administration portal allows you to program function keys. For more detailed information, please refer to the administration portal manual.You can access the snom 870 function keys (virtual keys) by pressing the 
button on the home screen.
- A green key indicates an incoming call. Tap on the green key, to pick up the call. Now, you have picked up the call.
- If the monitored extension is busy, the virtual function key lights up yellow.
Control codes allow direct access to the telephone system’s functions. The following codes apply:
| Code | Description |
| **## | Restart devices, only for snom devices! |
| #+n | Use outside line "n" to call the telephone number ("n" replaces the “0” otherwise required to access an outside line) |
| *1 | Start and end voice recording (if this function is enabled for the extension) |
| *10+profile number | Activation of the call forwarding profile |
| *11+TN | Permanent call forwarding to telephone number (TN) |
| **11 | Cancel permanent call forwarding |
| *12+TN | If not available, forward to telephone number (TN) |
| **12 | Cancel call forwarding if no answer |
| *13+TN | If busy, forward call to telephone number (TN) |
| **13 | Cancel call forwarding if busy |
| *14+TN | If not registered, forward to telephone number (TN) |
| **14 | Cancel forward if unregistered |
| *2+Speed dial | Directly dial the extension/telephone number via speed dial |
| *3 | Pick up the last call ringing in the pick-up groupe |
| *3+EXT | Pick up call coming in to the extension (EXT) |
| *490 | Activate call waiting |
| **490 | Deactivate call waiting |
| *5 |
|
| **5 | If busy, automatic callback deactivated |
| *55 | Specify primary device within a premium extension (Premium Package) |
| *72+nnnn1 | Call skill service nnnn |
| *73+nnnn1 | Call eFax additional costs will occur |
| *74+nnnn1 | Call time control nnnn |
| *75+nnnn1 | Call group nnnn |
| *76+nnnn1 | Call announcement nnnn |
| *77+nnnn1 | Call queue nnnn |
| *78+nnnn1 | Call conference service nnnn |
| *791 | *791 Access voice mail for this extension with password *791158 Access voice mail for extension 158, with the password for 158! *11*791 Transfer your calls to your voice mail *11*791158 Transfer your calls to the voice mail of the extension 158 |
| *792 | Access voice mail entering extension number, e.g. for remote enquiry |
| *80 | Activate intercom |
| **80 | Deactivate intercom |
| *80+NST | Intercom to extension (EXT) |
| *84+nnnn1 | Become member of the queue with service ID nnnn |
| **84+nnnn1 | Leave queue with service ID nnnn |
| *85 | Echo extension |
| *86 | Block caller ID (CLIR) |
| *860 | Show main number as telephone number |
| **86 | Show telephone number incl.direct dial (CLIP) |
| *87 | Subscribe to Skill-set |
| **87 | Unsubscribe to Skill-set |
| *9+Project Number | Define a project number for outbound calls. (Note: The project number is only valid for the very next outbound call) |
| Function codes for conference rooms during an active conference. | |
| ** | Help |
| *2 | Activate or deactivate mute. |
| *3 | Express your needs. |
| *5 | Activate or deactivate mute of all participant. |
| *6 | Lock the conference. |
| 1) nnnn is the four digit Service ID with leading zeros (0). For example, in a callgroup, IVR, eFax, etc. This means: is the Service ID "1", "0001" must be entered when entering the function code. |
Preferences 
key for several seconds. A “lock icon” in the display of your snom telephone indicates the telephone is locked.
on the snom telephone, to access the voicemail system’s voice menu.
on the touchpad.