Installation
57
A LAN line (twisted-pair line in accordance with 10BaseT or 100BaseTX) can be up to
100 m long. Secure operation with 100 Mbit/s requires the use of category 5 lines and
line sockets. Use a shielded Ethernet cable (STP cable, Shielded Twisted Pair cable).
DSL Port
External DSL modems can be connected via the LAN port. In the case of the
OpenCom 100, the output of the DSL modem (NTBBA) is led to the LAN port of the
OpenCom 100 via an external switch or hub. The router subsequently converts the
PPPoE protocol to the TCP/IP protocol of the LAN.
Connecting the OpenCom 100 to the network via ISDN and DSL
Connection of the DSL modem is via a crossover twisted-pair line. You can also use a
switchable port on the hub, which is usually indicated by an “X”.
Note
If an expansion module is installed in an OpenCom 130, you can also use the unused
LAN2 port to activate the DSL modem. Due to the “auto-crossover” function, you do
not require a cross-wired line with a LAN port of the expansion module. If you are op-
erating this OpenCom 130 as a slave system in a cascaded PBX, the LAN0 port on the
expansion module of the slave system can be used instead (see PBX Cascading start-
ing on page 152).
PCM Port
The PCM port is used cascade two communications systems together (see PBX Cas-
cading starting on page 152).
TAE
DSL
Splitter
NTBA
Hub
DSL & Uk
0
DSL
Modem
Uk
0
TCP/IP &
PPPoE
DSL
S
0
PC
Net
OpenCom
S
0
Net
Crosslinked twisted pair cable
PPPoE
TCP/IP
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