18
Port Assignment, Termination, Cable Lengths Installation
LAN Port
The LAN port (OpenCom 120: LAN 1
port) enables the integration of the
OpenCom 100 in an existing in-
house LAN by means of a 10-Mbit
hub.
The LAN cable must not exceed
100 m in length.
The second LAN port of the
OpenCom 120 is intended only for
networking two OpenCom 120/120
or 110/120 systems.
DSL Port
Connecting the OpenCom 100 to the
network via ISDN and DSL
The LAN port is also intended for
leading the DSL port to the router.
With the OpenCom 100, the output
of the DSL modem (NTBBA) is led to
the LAN port of the OpenCom 100
(LAN 1 in the case of the OpenCom
120) via a switch or hub. The router
subsequently converts the PPPoE
protocol to the TCP/IP protocol of
the LAN.
The connection of the DSL modem
is via a crossover twisted pair cable.
If so desired, you can also use a
switchable port on the hub, which is
usually indicated by an āX.ā
PCM Port
The PCM port is used to connect two
OpenCom 120 systems, or an Open-
Com 110 with an OpenCom 120
system by means of a special trans-
mission method called Pulse Code
Modulation. The RJ-45 cable used
must not exceed 4 m in length.
Sync Port
The twin-wire Sync port is used
when the OpenCom 100 functions
as a sub-system for a main system,
which is a DECT system.
TAE
DSL
Splitter
NTBA
Hub
OpenCom
S
0
Net
PC
Net
DSL
Modem
Crosslinked
Twistedpairkabel
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