Table Bf. Cdm Equalizers - AT&T System 85 Installation And Test
Release 2 versions 1, 2, 3, and 4. remote module and remote group interface
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Also See for System 85:
- User manual (44 pages) ,
- User manual (55 pages) ,
- Upgrade manual (240 pages)
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Equalization
Perform the following steps to set the Channel Division Multiplexer (CDM) equalization.
1. Determine the proper equalizer using the CSD and Table BF.
2. At the rear of the CDM, loosen thumbscrews at the top of the Data Service Panel and
swing the panel down.
3. Unplug the equalizers, see Figure 96.
4. Plug in the proper equalizers with the component side out. The components are located
on the lower half of the equalizers.
5. Close and secure the Data Service Panel.
TABLE BF. CDM Equalizers
-48 V
GND
VISUAL
ALARM
AUDIO
ALARM
20 Hz
PART NO.
DISTANCE
39004-001
0-150 FEET
39004-002
150-450 FEET
39004-003
450-750 FEET
39004-004
LIGHTNING ARRESTER
TB1
• 1
• 2
• 3
• 4
• 5
•
• 7
• 8
CHANNEL ASSIGNMENT
8
CARD SLOT
8
CARD SLOT
1
I••
111111
U.
111111
DROP 8
12
24
INSERT A
SPAN A
1
IN
2
3
4
5
6
SPAN B
7
IN
8
9
10
11
12
OU
Figure 96. Equalizer Location
T1 IN
GNO
Ti OUT
Ti IN
GNU
Ti OUT
Page 145
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