Pri (1Priu) Interface Pcb (Figure 2-16)2 - NEC Aspila EX Hardware Manual

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PRI (1PRIU) Interface PCB (Figure 2-16)
For ISDN Primary Rate Interface (PRI) applications, install a PRI Interface PCB. This PCB has a sin-
gle 32-channel (30B plus 2D) 2.048Mb/s digital signal circuit which can be configured for either PRI
trunks or PRI S-Bus. Each PCB connects to the network via an NTI Network Termination.
If set for PRI trunks, each PCB provides 30 PRI channels. The PCB supports the following PRI services:
When installed, the PRI Interface PCB uses the first block of 32 consecutive trunks. For example, if you
have a COIU PCB installed for trunks 1-8, the PRI Interface PCB will automatically use trunks 9-40. If
you have COIU PCBs installed for trunks 1-8 and 17-24, the PRI PCB will use trunks 25-56. The PRI
Interface PCB cannot use trunks 9-16 (even if available) since they are not part of a consecutive block of
32 trunks.
The PRI PCB requires one universal slot and provides a Block switch to busy out the PCB. When used
for T-Bus, up to 6 PCBs can be installed in the system (total 192 trunk ports). When used as S-Bus, up
to 8 PCBs can be installed (total 256 extension ports).
Switch
Name
SW100
SW101
SW3
(4 bit dip
switch)
SW3
(4 bit dip
switch)
(Cont'd)
CN11
Aspila EX Hardware Manual
Chuyên phân phối tổng đài NEC
Section 2: PCB Installation and Startup
Switch
Position
1.5M (PI/T1) Connecting a PRI/T1 (1.544Mb/s) line.
2M (PRI/E1) Connecting a PRI/E1 (2.048Mb/s) line.
T
S
Normal
Loop Used with Loop Back testing only.
Result
USA Only
Europe only
T-Bus polarity
S-Bus polarity
PRI (1.544Mb/s)
T1 (1.544Mb/s)
PRI (2.048Mb/s)
E1 (2.048Mb/s)
Idle
Section 2: PCB Installation and Startup
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