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 Figure 3-8) 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.
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
P
RT
1-2
T
4
E
PPER
ND
T
R
NLY
48V RE
N MODUL
1179675
1179641AL
