Installation
CHECKOUT
Check the KSU and telephone installation for proper
operation by performing the following actions.
Resistance
Check
Make the following resistance measurements at the Sta-
tion connector blocks under the following conditions.
l
AC power cord disconnected from electrical outlet.
l
KSU connected to station connector blocks.
l
Stationswired, and wiring punched
blocks.
l
Bridging clips removed from blocks to isolate sta-
tions from common equipment.
1.
Measure the resistance of each installed sta-
tion
and wiring from the station side of the con-
nector blocks. Resistance values will vary with
cable length and station type but should be
within the following limits. Readings which are
of these limits indicate a possible wiring
or station problem.
2 .
VOICE PAIR: (40 OHMS MIN.-150 OHMS MAX.)
DATAPAIR:
(0.3 OHMS
OHMS MAX.)
Measure the resistance of the KSU and cables
from the KSU side of the station connector
blocks. Resistance values should be within the
following limits.
MEASURFD PAIR
VOICE PAIR
DATA PAIR
Voltage
Check
MEASURED KSU
IN OHMS
40-50
0.3 0.5
Make the following voltage measurements at the station
connector blocks under the following conditions:
Bridging clips installed
l
AC power connected to the common equipment
Measure the voltage across one voice line and one data
line and then across the other voice line and the other
data line for each even and odd station. The measured
voltage must be as follows:
UNIT
BLOCK
I
TEST
CONNECTION
POLARITY
VOLTAGE
TYPICAL EVEN
Voice 1
I
Data 3
.
I
(Repeat for
each even sta.)
TYPICAL ODD
STATION
(Repeat for
each odd
voice 2
Data 4
Voice 5
Data 7
Voice 6
Data 8
I-)
- 3 3
5 VDC
Variant readings can indicate a possible wiring, station,
or common equipment problem.
General Check
1.
2 .
3 .
Check the red light emitting diode (LED) sys-
tem status indicator.
Be sure that it is on steady.
If it is off or flash-
ing, disconnect and reconnect the AC power
plug. If the indicator is still not on steady, refer
to the Failure Analysis Flow Chart found in
Chapter 4.
Refer to the station User’s Guide for operating
information.
Perform a general operational test of the sys-
tem by exercising the systemfeaturesfrom sta-
tion port 10 or 11. Operational parameters are
per the system default conditions as detailed in
Chapter 3 until COS programming is per-
formed.
Once the basic system is verified as operation-
al, perform the COS programming.
:
2-9