12 BRI DIGITAL VOICE I/O CARD
3021M100-002
12-3
The connector plate fixes the female RJ-45 connector and signal LEDs to the
chassis rear panel with two Phillips-head screws and limits dust accumulation and
electromagnetic radiation.
The configuration jumpers allow the BRI Digital Voice I/O card to be configured
as Terminal Equipment (TE) or as Network Termination (NT).
12.1.1 BRI Digital Voice I/O Jumper Settings
The BRI Digital Voice I/O card has a number of pin connectors that can be
modified with suitcase jumpers to change the configuration of the BRI Digital
Voice I/O card. These include jumpers for configuration and termination. The
location of these connectors, labeled LK 1 through LK 9, are shown in
Figure 12-1.
Configuration
For Network Termination (NT) configuration, connect pins 1 and 2 of th
appropriate connector. For Terminal Equipment (TE) configuration, connect pins
2 and 3 of the same connector. The following table provides the list of connectors
and their jumper settings.
Termination
For a CX950 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
BRI Digital Voice I/O card comes from the factory with the termination set to ON.
If the BRI Digital Voice 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.
12.1.2 BRI Port Signal Handling
The signal-to-pin relationships on the RJ-45 connector are different for a BRI
Digital Voice I/O card configured as TE (user side) or NT (network side). Tabl
12-2 below shows the signal pin-outs for each configuration.
Table 12-1 BRI Digital Voice Connector Jumper Settings
Connector NT Configuration TE Configuration (Default)
LK2 pins 1-2 pins 2-3
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
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