LANCOM 1722 VoIP – LANCOM 1724 VoIP
Chapter 1: Introduction
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EN
Point-to-multipoint connection (point-to-multipoint): Up to 8 ISDN termi-
nal devices can be connected to this type of connection. Terminal equip-
ment 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-point connection (point-to-point): 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 that is used is set up for the
type of line in use.
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 numbers (DDI).
However, only the main external 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 main number. The
main number, extension and area selection code (not including the lead-
ing zero) can be at the most 11 characters long.
The terms "point-to-multipoint connection" and "point-to-point con-
nection" are used in many countries to describe the technical imple-
mentation 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 tech-
nical specifications of your ISDN connection.
