2.2. Function keys & codes

On the administration portal you can assign the following functions to any function key:

  • Telephone number
  • Busy Field Light (BFL)
  • Intercom
  • Function code
  • Services

Please refer to the administration portal manual for detailed information.

Telephone number

You can program any telephone number to one of your function keys. Pressing the programmed function key then starts a telephone call.

Busy Field Light (BFL)

1. You can program any extension to one of your function keys. Pressing the programmed function key starts a telephone call.

2. A flashing LED for the respective function key indicates an incoming call to the extension. To pick up the call, simply press the flashing function key. In order to pick up calls, all parties must be members of a pick-up group.You have now picked up the call.

3. If the monitored extension (Busy Field Light (BFL)) is busy, the LED for the respective function key remains lit.

Program field keys freely programmable as function keys

Note: 8 function keys can be configured on each of the 3 pages so there are 24 function keys in total. You can switch between the pages by pressing the page keys below the function keys.


ATTENTION: only 21 of the 24 function keys can be used. The last 3 function keys are reserved as line keys.


Program any extension to one of your function keys, to then be able to communicate with this extension directly via the intercom by pressing this function key. However, the other party must also have the intercom activated on their telephone. Intercom refers to a conventional intercom system (similar to walkie-talkies), directly connecting you to the other party’s speaker by pressing the assigned function key.


Function code

You can also program functions such as call forwarding to function keys by entering various codes (see “Functions via control codes (* codes)” leaflet). Pressing the programmed function key then activates or deactivates this function.



Program any telephone system feature (queue, caller group, virtual conference room, etc.) to one of your function keys. This requires the service being assigned to an extension. Pressing the programmed function key then initiates a call to the service.


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 If busy, automatic callback activated
**5 If busy, automatic callback deactivated
*55 Specify primary device within a premium extension (Premium Package)

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 - 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+EXT Intercom to extension (EXT)
*84+nnnn1 Become member of the queue with service ID nnnn

Leave queue with service ID nnnn

*85 Echo extension

Block caller ID (CLIR)


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

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.