Lancom 1723 VOIP User Manual page 46

LANCOM 1722 VoIP – LANCOM 1723 VoIP – LANCOM 1724 VoIP – LANCOM 1823 VoIP
Avoid having multiple unconfigured LANCOMs at once within a single

network segment. Any unconfigured LANCOM takes on the same IP
address (ending in '254'), and so address conflicts could arise. To
avoid problems, multiple LANCOMs should be configured one after
the other with the respective device being assigned with a new and
unique IP address (not ending in '254') each time.
ADSL – connect the ADSL interface
plied ADSL connector cable (transparent connectors).
Connection to the ISDN – to connect the LANCOM VoIP Router to the
ISDN, plug in one end of a supplied ISDN cable (light-blue connectors) to
an ISDN interface in TE mode. When shipped, the ISDN interfaces marked
⌧
with are set up in TE (external) mode. Plug in the other end of the
ISDN cable into an ISDN/S
multipoint line connector.
For the models LANCOM 1723 VoIP and LANCOM 1823 VoIP, the

interface ISDN2 is not to be connected to the ISDN network, even
after being reset to TE mode!
Please also observe the notices about configuring the ISDN interfaces

(→page 121).
Connecting ISDN terminal devices—to connect ISDN terminal devices
(ISDN telephones or ISDN PBXs) to the LANCOM VoIP Router, connect
these to an ISDN interface in NT mode. When shipped, the ISDN interfaces
marked with
For the models LANCOM 1723 VoIP and LANCOM 1823 VoIP, the

ISDN2 interface
power from the ISDN feed. Please also observe the notices about con-
figuring the ISDN interfaces (→page 121).
Connecting to the analog telephone network—to connect the
LANCOM VoIP Router to the analog telephone network, plug the end of
the supplied analog connector cable marked in yellow (RJ45) into the
combined ISDN/analog interface ¾. The other end of the analog connec-
tor cable (RJ11) is to be plugged into an analog exchange line (e.g. a split-
ter). If the exchange line has a TAE-N/F socket, you can use the supplied
µ
with the splitter by using the sup-
point-to-point line connector or point-to-
0
are set to NT (internal ISDN connection) mode.
º
can supply a maximum of two telephones with
Chapter 2: Installation
45