Below you will see an overview over all keys of the respective models.

• Pick up the receiver.
• Enter the telephone number.
• Confirm your call by pressing  or the Send soft key.
• End the conversation by pressing the soft key End Call,  or hanging up.

Alternative:

• Enter the telephone number.
• Pick up the receiver.
• End the conversation by pressing the End Call soft key,  or hanging up.

Press the speaker key to activate the speaker.

• Dial the telephone number.
• Confirm your call by pressing  or the Send soft key.
• End the conversation by pressing the soft key End Call or .

• Activate the headset by pressing the headset key .
• Dial the telephone number.
• Confirm your call by pressing  or the Send soft key.
• End the conversation by pressing the soft key End Call or .

To answer an incoming call, you have the following options:

• Pick up the receiver or press the speaker key  to answer an incoming call. Press the headset key  in order to answer with your headset.
• End the conversation by hanging up, pressing the End Call soft key, pressing , or the headset key  (when using the headset).

The display of the telephone sends out a double knocking sound as soon as a second call comes in during an active conversation.

You have the following options:

• You can take the incoming call by pressing the Answer soft key and set the active conversation on hold.
• You can reject the incoming call by pressing the soft key Reject.
• You can transfer the incoming call without taking it directly. Press the Transfer soft key or the transfer key *.

• In order to hold an active call, press the Hold key or push the Hold button *.
• To take an incoming call during an active conversation, press the Answer soft key. To reject an incoming call, press the Reject soft key. You can transfer incoming calls directly by pressing the transfer button * or the Transfer soft key.

⇒The active conversation is now on hold.

• To toggle between two callers, press the soft key Swap. You can further toggle between the conversations using the navigation keys and confirm your choice by pressing the Resume soft key.

⇒The active conversation is put on hold and the caller hears a waiting music.

* available only for T46G and T48G

• Accept the incoming call by pressing the soft key Answer.
• After taking the call, press the Transfer soft key or *.
• Now enter the extension number.
• Press .
• Announce the incoming call.
• To transfer the call, press the Transfer soft key or  *, then you can hang up.

• Press the Transfer soft key or * during an active call.
• Enter the extension number.
• Press .
• Press the Transfer soft key or *.
• Hang up.

• Do not take the incoming call.
• Press the soft key Transfer or *.
• Enter the number.
• Press the Transfer / Send soft key or *.
• Hang up to finalise the transfer.

* Only for T46G and T48G.

Follow these steps to start a conference call:

• Call the first participant.
• Press the Conference soft key.
• Dial the second participant's number.
• Press , , the soft key Send or Conference.
• As soon as the second party answers the call, press the Conference soft key once again to start the conversation with both participants.

The Do Not Disturb (DND) function rejects incoming calls automatically.(Incoming calls will be shows as "missed calls").

To activate the DND-mode on your telephone:

• Push the DND soft key will enable the DND mode.

Your telephone is in DND mode as soon as the display shows either  or . If the DND mode is activated, the caller will be IMMEDIATELY transferred to the target of the call forwarding "after time".

The Completion of Calls on No Reply (CCNR) creates a callback in case a person cannot be reached (e.g. the person is not on its desk or busy) at the moment.

A caller generates automatic connection establishment within the private branch exchange (PBX) to a previously busy party (only internally). If the the other party cannot be reached, the caller can use the callback function.

• In order to activate the function, insert *5 into your key pad. An acoustic confirmation will finalize the activation.
• As soon as the other party is available again, your end device receives a callback generated by the PBX. As soon as you answer the callback, the PBX sends out a call to the number you tried to reach initially.

• If the callback is no longer needed, all call backs can be erased by entering the **5 code into the key pad. An acoustic confirmation finalises the erase.

When accessing the voice mail system for the first time, set up your personal voice mail.

• Press the message key on the telephone or dial the extension assigned by the administration portal to access the voice mail menu.
• Then select “0 Mailbox Options” to set up your voice mail box.
• Now press “1” to record a message in the event you are unavailable.
• Now record your message and press “#” to end the recording.
• Press “1” to accept the recording, “2” to replay the recording, and “3” to record a second time.

• Press the Message key  or dial *791 to access the voice mail.
• Enter your extension you saved in the administration portal and your voice mail pin to access the voice mail options.

The basic function of “Hot desking” allows cancelling the registration of existing users and registering new users to your end device. This function is useful when employees frequently change their work station but don’t take along their end devices. After completing registration, your configuration is automatically copied to the new telephone.

Step 1: Cancelling the registration of the current extension
Menu -> Phone settings -> Logoff -> Select

Step 2: Registering the new extension
Login -> Enter the extension number -> Submit -> Enter voice mail PIN -> Submit

After pressing the Menu key you have the following options:

• Call waiting indication: define whether this function should be activated.
• (optional, depending on settings on the administration portal) Timeout: set the ringing time.
• (optional, depending on settings on the administration portal) Intercom: the intercom function enables speaking directly to a linked extension through the system, without dial tone and ring tone.
• 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 the function Call forwarding
• Parallel call: configure another telephone or your mobile phone to ring in addition to your telephone when a call comes in. You can then answer the call with one of the two telephones.

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.

For details, please click here.

• Automatic redialling
• Suggests number (if necessary, remove function)
• Ring tone
• Define as primary device
• Logoff

Queues can be enabled or disabled; for set-up see administration portal manual)

You can save up to 12 (T52S) or 16 function keys (T54S) on three levels on your telephone.

Additional function keys can be configured via the EXP50 expansion module.

You can save up to 15 or 27 function keys (T46G) on three levels on your telephone.

You can add any extension or telephone 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.

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.

Entering various codes (as listed on the following page) 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:

You need your phone's IP address for example for configuration of the CTI client.

• Press   in the idle screen to have your IP address, MAC address and firmware displayed.
• The IP address of the T57W can be found by pressing "MUTE" and then "Status".