Section 2: PCB Installation and Startup
Aspila EX Hardware Manual
Section 2: PCB Installation and Startup
2-37
2
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
Switch
Position
Result
SW100
1.5M (PI/T1)
Connecting a PRI/T1 (1.544Mb/s) line.
USA Only
2M (PRI/E1)
Connecting a PRI/E1 (2.048Mb/s) line.
Europe only
SW101
T
T-Bus polarity
S
S-Bus polarity
SW3
(4 bit dip
switch)
PRI (1.544Mb/s)
T1 (1.544Mb/s)
SW3
(4 bit dip
switch)
(Cont’d)
PRI (2.048Mb/s)
E1 (2.048Mb/s)
CN11
Normal
Idle
Loop
Used with Loop Back testing only.
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