Total Access 1248 Quad T1 IMA 48-Port DSLAM with Modem Installation and Maintenance Practice
3-12
61179641AL1-5C
Alarm Connections
The Total Access 1248 provides an alarm port (see
) with three auxiliary alarm
inputs and three alarm outputs (Major, Minor, and Critical). If load shedding is active then the
Critical alarm output will be active. Alarm inputs are activated by shorting A and B contacts
(closing an externally connected relay). The outputs provide both normally open and normally
closed pins (through internal relay contacts) for proper operation with a variety of alarm
panels. Each alarm event generates an autonomous TL1 message that is transmitted via the
in-band management channel to a monitoring device.
A cable with a high density DB-15 male connector on one end and a stub at the other end is
available (P/N 1196DB901L1) for wire-wrap connections to an alarm panel.
Figure 3-8. Total Access 1248 Alarm Connection
The alarm pinouts are shown in
Table 3-3. Alarm Pinouts
Pin
Color
Contact Description
1
Red
Alarm 3 Input - A
2
Red/Black
Alarm 1 Input - B
3
Red/White
Critical Alarm COM
4
Orange
Minor Alarm COM
5
Orange/Black
Major Alarm COM
6
White
Alarm 3 Input - B
7
White/Black
Alarm 2 Input - A
8
Black
Critical Alarm NC
9
Black/White
Minor Alarm NC
10
Blue/Black
Major Alarm NC
11
Blue/White
Alarm 2 Input - B
12
Blue
Alarm 1 Input - A
13
Green/Black
Critical Alarm NO
14
Green/White
Minor Alarm NO
15
Green
Major Alarm NO
PORTS 1-24
OUT
EXPANSION
-48V .....,5.0A
.
USE COPPER CONDUCTORS ONLY!
A
-48V RET
A
AN MODULE
1179675L1
1179641AL1
ALARM
