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LANCOM 1722 VoIP – LANCOM 1723 VoIP – LANCOM 1724 VoIP – LANCOM 1823 VoIP
Chapter 2: Installation
46
EN
cable supplied for this. Connect the LANCOM configuration interface
to an available serial interface on the PC.
Connecting an external modem—optionally, an external analog or
GPRS modem can be connected to the device's serial interface with the
LANCOM Modem Adapter Kit, so enabling tasks such as remote mainte-
nance, backup connections or Dynamic VPN to be implemented over an
additional WAN connection via an analog line.
! Power supply – the socket is for connecting the supplied power sup-
ply unit.
Use only the supplied power supply unit! The use of the wrong power
supply unit can be of danger to the device or persons.
" Ready for operation? – After a brief self-test, the power LED lights up
continuously. Green LAN LEDs show which LAN connectors are being used
for a connection.
Devices with integrated ADSL modems can become very warm during
operation. For these models, environmental temperatures are not to
exceed 35°C. Sufficient ventilation is of vital importance. Do not stack
the devices and do not expose them to direct sunlight.
2.5 Configuring the ISDN and analog interfaces
LANCOM VoIP Router routers feature several interfaces for connection to ISDN
or analog exchange lines, or for connecting ISDN or analog terminal equip-
ment.
A fundamental decision is whether an internal PBX is to be connected and
made VoIP-capable by the LANCOM VoIP Router (e.g. for a single site or for
the networking of branches) or whether the LANCOM VoIP Router is to replace
a local PBX.
If a PBX is to be made VoIP-capable, simply leave the ISDN interfaces with
their standard factory settings. On the underside of the device, check that
all of the DIP switches are in the standard position as shown on the
sticker. Connections of this type do not require an ISDN cross-over
adapter.
If the LANCOM VoIP Router is to replace a PBX, you can use all of the suit-
able ISDN interfaces to connect to the PSTN (public services telephone
network). Set the DIP switches on the underside of the device accordingly
46


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