Specifications

Section 3: Installing Extensions and Trunks
Aspire S Hardware Manual Section 3: Installing Extensions and Trunks ◆ 3-21
3
Troubleshooting CO Lines
Start
Verify the COIU PCB
is functioning.
Is the Live
Status LED on
the COIU PCB
flashing green?
Remove the PCB and
insert another COIU
PCB into the same
slot. Does it work?
Screen the problem
(whether problem
exists in system or
with central office).
The COIU PCB may
need repair.
Main equipment
(cabinet/CPU) may
need repair.
Connect a test
telephone to the
CO line side. Is
dial tone heard?
Contact the CO to
investigate the line.
Verify if the problem is
with the main equipment
or the CO line by using a
test set before the
connection to the system.
Is the wiring for the
cables correct?
Redo the wires between
the main equipment and
the CO line.
The COIU PCB may
need repair.
Yes
Yes
Yes
No
No
No
Yes
No
* If it still does not work,
replace the cable(s) and/
or connectors.
Check system
programming for the
extension. Refer to the
Aspire Software
Manual if necessary.
Try placing a call on the
CO line. Does it work?
Stop
Yes
No
Is the Run/Block
switch (SW2) set
to block?
No
Is the Live
Status LED on
the COIU PCB
flashing green?
Yes
No
Set the Run/Block
switch to the Run
position.
Stop
Can a call be placed
on the CO line?
Yes
Yes
No
Measure the loop
current on the line with
a digital voltmeter.
Is the PBXG grounding wire from
the PCB attached to the PBXG bar
in the cabinet and is there a proper
earth ground for the system?
Yes
Connect the proper
grounding wires for
the system.
No