Depending on the used phone type, there are differences in the operation and programming of the PBX. The following phones can be operated at the PBX:

If you are already in a call state (internal or external), you have to press the Flash key (signal key, R key) first on a DTMF phone before dialling a digit, e.g. for a call transfer.

Due to the difficulties concerning the transferring with PD phones, this function is not available for this kind of phones. If your telephone offers both dialling modes, you should therefore set it to DTMF.

On some analogue DTMF telephones, specific T-Net functions can be performed in the analogue T-Net via the menu or via specific function keys. If you are operating such a phone as an internal phone, you can also use these comfortable operating modes for some functions of the PBX. Please note that the T-Net functions of the phone are limited because the PBX doesn‘t support some functions. If you want to use the T-Net functions of your phone, read the manual for the phone. When entering telephone numbers, take care to enter the leading exchange line access number. Instead of an "announcement of the central office", you will hear the confirmation tone for successful programming.

On some standard VoIP phones, functions such as Call waiting, Conference call, Query call and Splitting a call are not carried out via the PBX, but rather on the phone itself. Therefore, the instructions for operating these functions may deviate from the descriptions in this guide.

Normally, pressing the pound key # on a standard VoIP telephone initiates a dialling procedure. Since this key is required for numerous functions, as well as for all settings (programming), using the pound key for these actions is not possible on most standard VoIP phones (for more information on this, read the manual for the phone).