LANCOM 1722 VoIP – LANCOM 1723 VoIP – LANCOM 1724 VoIP – LANCOM 1823 VoIP
Chapter 1: Introduction
25
EN
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 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.
Bandwidth reservation with failover
High-performance VPN functions allow the reliable transmission of voice and
data between company sites. This spares the telephone bill from internal com-
munications. A professional firewall, versatile routing functions and excellent
Quality of Service mechanisms make the LANCOM VoIP Router a comprehen-
sive solution for secure voice and data communication in a single compact
device. All functions are integrated into the central management functions.
1.5
Just what can your LANCOM do?
The following table provides a comparison of the properties and functions of
your device.
LA
NCOM
1
722 V
o
IP
LA
NCOM
1
723 V
o
IP
LA
NCOM
1
724 V
o
IP
LA
NCOM
1
823 V
o
IP
Applications
Internet access
✔
✔
✔
✔
LAN-LAN coupling over VPN
✔
✔
✔
✔
