NEC Aspire Manual page 46

Section 2: Components
4 BRI Card (4BRIU) — P/N 0891007
8 BRI Card (8BRIU) — P/N 0891008
38
The 4BRIU PCB provides:
●
4 2-Channel Circuits (2B + D) conÞgured as T-Bus or S-Bus
● 64 Kb/s Clear B-Channel and 16 Kb/s D-Channel
● 4 trunk/extension status LEDs
● 1 PCB status LED
● 1 run/block switch
The BRI Interface PCB uses a single universal slot. A maximum of 15 4BRIU PCBs can be
installed. When used only as T-Bus, the PCB consumes 8 trunk ports. If S-Bus is deÞned in Pro-
gram 10-03-01 for the PCB, then 16 station ports are assigned as well. Each PCB connects to the
network via an NTI Network Termination. With the maximum number of PCBs installed, the fol-
lowing can be provided:
● The 4BRI provides 60 BRI circuits and 120 BRI channels.
The trunk circuit can be connected to either an ISDN trunk or ISDN telephone set, depending on
the SW102 through SW402 switch settings. When used for S-Bus, a maximum of 8 ISDN terminals
can be connected to each circuit.
Four ISDN telephone circuits (1-4) are supplied with DC power from the Aspire system.
The 8BRIU PCB provides:
● 8 2-Channel Circuits (2B + D) conÞgured as T-Bus or S-Bus
● 64 Kb/s Clear B-Channel and 16 Kb/s D-Channel
● 8 trunk/extension status LEDs
● 1 PCB status LED
● 1 run/block switch
The BRI Interface PCB uses a single universal slot. With the 8BRIU
PCBs, a maximum of 12 PCBs can be installed when used for T-Bus connections - 15 PCBs can be
installed when used for S-Bus connections.When used only as T-Bus, the PCB consumes 16 trunk
ports. If S-Bus is deÞned in Program 10-03-01 for the PCB, then 32 station ports are assigned as
well. Each PCB connects to the network via an NTI Network Termination. With the maximum
number of PCBs installed, the following can be provided:
●
The 8BRI, when used as T-Bus, provides 96 BRI circuits and 192 BRI channels. When used as
S-Bus, 120 BRI circuits and 240 S-Bus station ports are provided.
The trunk circuit can be connected to either an ISDN trunk or ISDN telephone set, depending on
the SW102 through SW802 switch settings. When used for S-Bus, a maximum of 8 ISDN terminals
can be connected to each circuit.
The Þrst 4 ISDN telephone circuits (1-4) are supplied with DC power from the Aspire system. If the
last four circuits (5-8) are to be used for S-Bus, they must use ISDN telephone sets which provide
their own local power supply as the system does not provide DC power to these circuits.
Product Description