2. Advanced telephone functions
2.1. Overview
Basic settings for the snom telephone can also be configured using the menu key:
After pressing the menu key, you can choose from the following functions:
Call settings
Call waiting indication: define whether this function should be activated.
imeout: set the ringing time (optional, depending on settings on the administration portal)
ntercom: the intercom function enables speaking directly to a linked extension through the system, without dial tone and ring tone (optional, depending on settings on the administration portal)
Caller ID block: set your entire number to be shown to the party being called, the switchboard number to be displayed or all caller ID information to be blocked
Call forwarding: activate Call forwarding
Parallel call: configure another phone or your mobile phone to ring in addition to your phone when a call comes in. You can then answer the call with one of the two phones.
Call forwarding: profiles
Here you can select your preconfigured call forwarding profiles. For details, please refer to the Ncontrol manual. You can edit the default profile directly via your device.
Telephone settings
Automatic redialling
Suggests number (if necessary, remove function)
Ring tone
Define as primary device
Logoff
Queues
Queues can be enabled or disabled (for the set-up, see the Administration portal documentation).
2.2. Function keys & codes
Assignment of the function keys:
You can assign the function keys via the Administration portal.
You can access the function keys (virtual keys) of the snom 821 by pressing the button:
on the start screen or by pressing the red X.
Standard settings (i.e. no programming): Local Loop
Incoming calls are indicated respectively by the first LED (set to local loop) flashing.
When the call is answered, the LED stays lit.
If a second call comes in during this call, the second LED flashes.
By pressing the key next to the flashing LED, the first call is automatically placed on hold and the second call is answered.
You can now toggle between the calls by pressing the key next to the flashing or steady lit LED. In this manner, you can make a total of five calls at the same time.
Extension/phone number
You can add any extension or phone number to the busy lamp field.
You can start a call by pressing the respective busy lamp key. If an internal extension is programmed, you can see whether that extension is currently busy:
If the LED next to the key flashes, the party receives a call.
If the LED is consistently lit, the party has answered a call and is currently busy.
If the LED next to the respective key flashes, you can take the call by pressing the respective key next to the flashing LED.
Intercom
You can add any extension in the PBX system and then use this function key to directly communicate with this extension through the intercom. The other party must have the intercom activated on their device. 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.
Additional functions via * codes
Entering various codes (as listed below) allows you to additionally program functions, such as call transfer to the keys.To do so, simply enter the code with the desired number in the entry field.
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 | Activate the call forwarding profile |
*11+TN | Permanent call forwarding to a phone number (TN) |
**11 | Cancel permanent call forwarding |
*12+TN | If not available, forward to a phone number (TN) |
**12 | Cancel call forwarding if no answer |
*13+TN | If busy, forward call to a phone number (TN) |
**13 | Cancel call forwarding if busy |
*14+TN | If not registered, forward to a phone number (TN) |
**14 | Cancel forwarding if unregistered |
*2+Speed dial | Directly dial the extension/phone number via speed dial |
*3 | Pick up the last call ringing in the pick-up group |
*3+EXT | Pick up a 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) |
*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 voicemail for this extension with password *791158 Accessvoice mail for extension 158, with the password for 158 *11*791 Transfer your calls to your voicemail *11*791158 Transfer your calls to the voicemail of the extension 158 |
*792 | Access voicemail 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 a Skill set |
**87 | Unsubscribe from a 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 participants |
*6 | Lock 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. |
2.3. Telephone lock
You have the option to protect your phone from improper use by locking its keypad.
With the keypad locked, it is not possible to make any outgoing calls. However, the keypad lock can be deactivated at any time.
How to lock your snom phone:
Press and hold the 
key for several seconds.
⇒ The lock icon on the display of your snom phone indicates that the telephone is locked.
How to deactivate the keypad lock:
Press and hold the key for several seconds.
⇒ By default the keypad lock requires a voicemail PIN.
Where do you enter your voicemail PIN?
1. Go to the web interface of your end device.
2. Enter your personal voicemail PIN under:
Settings 
Preferences Keypad Lock
⇒ You can also change or deactivate your voicemail PIN.