
CX900e Hardware Reference Manual
13-4
3006M100-002
Termination
For a CX900e with an I/O configured as NT or if it is the last TE on the line,
termination must be turned ON by connecting pins 1 and 2 at LK 7 and LK 9. The
ISDN BRI-S/T I/O card comes from the factory with the termination set to ON.
If the ISDN BRI-S/T I/O is configured as TE and it is not the last TE on the line,
termination must be turned OFF by connecting pins 2 and 3 at LK 7 and LK 9.
13.1.2
ISDN BRI-S/T Port Signal Handling
The signal-to-pin relationships on the RJ-45 connector are different for an ISDN
BRI-S/T I/O card configured as TE (user side) or NT (network side). Table 13-2
shows the signal pin-outs for each configuration.
LK3
pins 1-2
pins 2-3
LK4
pins 1-2
pins 2-3
LK5
pins 1-2
pins 2-3
LK6
pins 1-2
pins 2-3
LK8
pins 1-2
pins 2-3
Table 13-1 ISDN BRI-S/T Connector Jumper Settings
Connector NT Configuration TE Configuration (Default)
Summary of Contents for CX900e
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