❑
Attach the carrier to the rack frame using the screws provided.
Step 2: Make power and line connections to each unit
Complete the following steps for each Polling Controller to be installed:
❑
Insert the unit in any of the eight slots (the slots are interchangeable), with
the power jack towards the bottom and the LED towards the top.
❑
Connect power to each unit installed in the Carrier. (Eight power jacks are
available in the cable trough at the front of the carrier, below the card
slots.)
❑
Connect a telephone line to the Polling Controller jack labeled “Telco Line”
using a standard modular cord (not supplied). Tag and label each line for
future reference.
❑
Use a standard polarity tester to check the polarity. Polarity must be
correct on the wiring to the units to minimize relay contact wear and avoid
“bell tap,” a momentary or single ring of the telephone bell.
Caution:
The unit should be powered down whenever you are testing polarity.
UM
-1
12.CD
R
12.00" MAX
5.00" MAX
17.30" MAX
19.00"
18.31"
6.96" MAX
4.00"
POLLING
CONTROLLER,
M-390
Figure 3 Polling Controller Carrier (UM-112-801)
Chapter 3: Polling Controller Installation
40-400-00013, Rev.
C
Page 9
