Bri (2Briu) Interface Pcb (Figure 2-34) - NEC UX5000 Hardware Manual

Chapter 2 - PCB Installation and Startup
2.7.5

BRI (2BRIU) Interface PCB (Figure 2-34)

The BRI PCB provides:
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2 (2BRIU) 2-Channel Circuits (2B + D) configured as T-Bus or S-Bus
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64 Kb/s Clear B-Channel and 16 Kb/s D-Channel
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2 PCB status LEDs
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Connector for 2BRIDB
These trunk circuits can be connected to either ISDN trunks or ISDN telephones, depending on the switch
setting within system programming. All ISDN telephone circuits (#1-2 and #3-4 [with the BRI daughter board])
are supplied DC power from the UX5000 system.
When used for S-Bus, a maximum of 8 ISDN terminals can be connected to each circuit.
The BRI Interface PCB uses a single universal slot. Each PCB connects to the network via an NTI Network
Termination.
In order to block new calls on the PCB, system programming (Program 90-05-01, Menu 3) must be used. This
program will prevent new calls from being established on the PCB, but it will not terminate any existing calls.
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Figure 2-34: BRI PCB - COMPONENT SIDE
Chapter 2