Specifications
Installation
IMI 66-0611
SECTION 3
CHECKOUT AND FAILURE ISOLATION
INSTALLATION
CHECKOUT
RESISTANCE CHECK
1
MEASURED PAIR MEASURED COMMON ,’
hQlJ;P$‘lNT RESISTANCE
Make the following resistance measurements at the
station connector blocks under the following conditions.
l
AC power cord disconnected from electrical outlet.
VOICE PAIR
DATA PAIR
VOLTAGE CHECK
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Common equipment connected to station connector
blocks.
Refer to
Table
3-3 and make the following voltage
measurements at the station connector blocks under
the following conditions:
l
Stations wired, and wiring punched down on blocks.
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Bridging clips installed
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Bridging clips removed from blocks to isolate
stations from common equipment.
1. Measure the resistance of each installed station
and wiring from the station side of the connector
blocks. Resistance values will vary with cable
length and station type but should be within the
following limits.
MEASURED PAIR MEASURED STATION
RESISTANCE IN OHMS
0 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:
GENERAL CHECK
1. Check the red light emitting diode (LED) system
status indicator. Be sure that it is on steady. If it is
off or flashing, disconnect and reconnect the AC
power plug.
VOICE PAIR 40 - 150
DATA PAIR 0.3-100
2. Measure the resistance of the common equipment
and cables from the common equipment side of the
station connector blocks. Resistance values should
be within the following limits.
40-50
0.3 - 0.5
2. Refer to the station User’s Guide for operating
information. Perform a general operational test of
the system by exercising the system features from
station port 10.
Table 3-3. Voltage Measurements
’ UNIT UNDER 66M-xx BLOCK METER LEAD MEASURED
TEST CONNECTION POLARITY VOLTAGE
TYPICAL EVEN Voice 1
I+)
STATION
1
Data 3
(Repeat for Voice 2
each even sta.) Data 4
TYPICAL ODD Voice 5
STATION Data 7
(Repeat for Voice 6
each odd sta.) Data 8
, I
0
+34 +/- 8
VDC
(+,
t-1
+34 +/- 8
VDC
(+I
(9
-34 +/- 8
VDC
t f
1
-34 +/- 8
VDC
Variant readings can indicate a possible wiring, station,
or common eauinment oroblem.
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