Specifications

Section 3: Installing Extensions and Trunks
Aspire S Hardware Manual Section 3: Installing Extensions and Trunks ◆ 3-23
3
Troubleshooting ISDN Lines
Start
Verify the BRIU PCB
is functioning.
Is the Live Status
LED on the BRIU
PCB flashing green?
Remove the PCB and
insert another BRIU
PCB into the same slot.
Does it work?
Verify wiring between
main equipment and
CO line.
The BRIU PCB may
need repair.
Main equipment
(cabinet/CPU) may
need repair.
Is the cable
wiring correct?
DSU may need repair.
Insert another BRIU PCB
into the same slot in the
CPU. Does it work?
T-Point portion of the external
DSU may need repair.
The BRIU PCB may
need repair.
Yes
Yes
No
Yes
No
Yes
No
The main equipment
(cabinet/CPU) may
need repair.
* If it still does not work,
replace the cable(s) and/
or connectors.
Yes
No
Is the ISDN Layer1
link established
(LD2, LD3 flashing)
on the BRIU PCB?
No
Redo the wires
correctly.
No
Request the CO
perform a
loopback test of
the DSU. Any
problems found?
Yes
If an external DSU is
used, connect the
ISDN terminal to the
T-Point. Is it possible
to make a call?
No
Yes
Check system programming
for the extension. Refer to the
Aspire Software Manual if
necessary. Is it possible to
make a call?
No
Stop
Yes