Note: you can enter a zero both as a single number (e.g. 0 to 99, as is usually the case) and as a digit in the set number of places in extension numbers (e.g. 00 to 99).

Note: If linear call distribution for the PTP connection is enabled (Public switched tel. networks > Call distribution page), and if the internal numbers match the external extension numbers, the system automatically performs a 1:1 assignment for the extension numbers in the extensions block. If an extension cannot be assigned, the fallback call distribution function is enabled.

Note: If you want an extension number to be different from the ones used in linear call distribution, or if an extension number is needed for a different function (e.g. remote configuration, CLIP no screening), you must also enter it in the phone number list (Public switched tel. networks > ISDN > Extension numbers PTP connection).

Note: For example, for extensions block 0 to 99: enter extension 0 as an extension and assign it in the call distribution.

Note: For example, for extensions block 00 to 99: enter the individual extension numbers 00 to 09 as an extension number and assign them during call distribution. The PBX will then only react when the number of places is reached, for example, if the caller dials 00 as an extension number. In contrast, if the caller only dials 0, the fallback call distribution function is enabled as soon as the time for selecting a suffix dialling digit has passed.

Note: You must enter all the extension numbers for a PTP connection that is not running linear call distribution.

Note: When you configure the GSM gateway, you must also input the connection type of the ISDN connection.

Note: GSM gateways accept external phone calls automatically. This may cause call charges for the caller, even if no-one picks up the phone at the internal destination.

Note: If the PBX is not connected to the land line, outgoing external calls can only be accepted via a targeted exchange line access using the phone numbers entered on the page Routing > VoIP/GSM Routing > Exception numbers (and the corresponding accesses, also configured on this page) or via a configured preferred exchange line (exchange line settings for subscribers or groups).

Note: When switched off, this exchange line cannot be used for emergency calls. When you attempt to dial an emergency number, you will hear the announcement, "This phone does not allow emergency calls. Please use an alternative."

Note: If the network provider assigns the same PBX base number to a number of PTP connections, these connections can be bundled together. A bundled PTP connection consists of all the ports assigned to the same line that have the same phone number and the same extensions block. Additional settings can also be made for the bundle.

Note: A "primary multiplex interface" is the same as a bundle and cannot be combined with other connections.