LANCOM VoIP routers support point-to-multipoint and point-to-point connections:
- Point-to-multipoint connection (point-to-multipoint): Up to 8 ISDN terminal devices can be connected to this type of connection. Terminal equipment can include ISDN telephones and ISDN PBXs, which can be used for connecting yet more equipment. As an alternative, a LANCOM VoIP router can be connected to a point-to-multipoint connection.
- Point-to-multipoint connection (point-to-multipoint): This type of device is suitable for the connection of one ISDN device only, generally an ISDN PBX. As an alternative, a LANCOM VoIP router can be connected to a point-to-point connection.
To connect a LANCOM VoIP router, the interface is set up for the type of line at hand.
Equipment connected to an ISDN connection can be addressed in two ways:
- The devices are addressed with a multiple subscriber number (MSN) that is linked to the ISDN connection and cannot be influenced.
- Terminal devices are addressed via a Direct Dialing In-Number (DDI). However, only the switchboard number is associated with the telephone line; the extension numbers that address the individual terminal devices can be chosen at will and are merely suffixes to the switchboard number. The switchboard number, extension and area selection code (not including the leading zero) can be at the most 11 characters long.
Note: The terms "point-to-multipoint connection" and "point-to-point connection" are used in many countries to describe the technical implementation of point-to-multipoint with MSN and point-to-point with DDI. Other countries may use different types of connection and other combinations of protocol and call-number type, or even different names. Please refer to your telephone network operator for the technical specifications of your ISDN connection.
