P
AGE
18
44023-1297 <90-00058>
INSTALLATION
STEP
1
2
3
4
5
6
ACTION
Remove power from module receptacle.
Plug in 44023 module.
Apply power
For 440 system single-station packages
and other applications: Insert a test tone
at the 4W RCV input (pins 2 and 4) or at
the LINE RECEIVE test points. Insert
bridged level meter at the LINE
RECEIVE test points.
Note:
Any source device that loads the input
will have to be disconnected.
For Multi-station packages: At the 44011
patch from the EXT OSC jack to the
LINE RCV jack (on the 44011). Insert a
bridged level meter at the RECEIVE
DIST and GND test points on the 44023
to be tested.
Move level meter (600 ohm terminated)
to the RCV DROP jack.
Press TEST/RST switch.
Remove meter and oscillator connections.
Insert test oscillator at the TRANSMIT
DROP jack
Connect bridged level meter across
generator terminals.
For 440 system single-station package
and other applications: Move terminated
level meter to the LINE TRANSMIT test
points.
Note:
Any source device that loads the input
will have to be disconnected.
For multi-station packages: Move the
bridged level meter to the TRANSMIT
DIST and GND test points on the 44023
under test.
RESULTS
No LEDs should light. If OFF HOOK LED
is on, reset it by pressing the TEST/RST
switch once or twice.
Set frequency to approximately 1 KHz.
Set level to system test-tone level (0dBmO)
Set level to -10 dBm by adjusting the EXT
ADJ knob on the 44011 front panel.
Read no signal.
OFF HOOK LED comes on. Read system
test-tone level (0 dBmO). Adjust RECEIVE
level control as required. Strap out the
input pad only if necessary to obtain level
(has no effect in multi-station packages).
OFF HOOK LED remains on,
Set level for system test-tone level.
(0dBmO).
Read system test-tone level (0 dBmo).
Adjust TRANSMIT level control as
required. Strap the output pad in or out as
needed to reach required level.
Read -10 dBm. Adjust TRANSMIT level
control as required.
CONTINUED
. . .
T
ABLE
B - 44023 PABX/T
RUNK
I
NTERFACE
C
HECK
-O
UT
P
ROCEDURE
