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FIC-2BSV/FIC-4BSV Module 223
Interface Cable When a BSV interface works in user mode, it uses a straight-through ISDN S/T
interface cable for connection. At the two ends of the cable are RJ-45 connectors
with pins 3 and 6 for data transmission and pins 4 and 5 for data receiving.
Figure 274 Straight-through ISDN S/T cable
When a BSV interface works in network mode, it uses a crossover ISDN S/T
interface cable for connection, with pins 3 and 6 for data transmission and pins 4
and 5 for data receiving. At one end of the cable is an RJ-45 male connector for
connecting the FIC-2BSV/FIC-4BSV interface and at the other end of the cable is
an RJ-45 female connector for connecting a TE device.
Figure 275 Crossover ISDN S/T cable
Connecting the Interface
Cable
c
CAUTION:
■ If outdoor cabling is involved, you need to install a lightning arrester at the
input end of the ISDN BRI S/T interface cable to avoid lightning strike.
■ When connecting the interface cable, pay attention to the mark on the
interface to avoid wrong insertion, which may damage the interface card or
even the router host.
Step 1: Identify the operating mode of the BSV interface. If the interface is to be
connected to an ISDN network, it should operate in user mode; if the interface is
to be connected to a TE device, such as a digital phone or another BSV interface in
user mode, the interface should operate in network mode.
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