CiTRANS R820 Edge Router Hardware Description
Table 2-4
Subrack Alarm Input Terminals (Continued)
Terminal Name
Interface Type
Function
XS1
Network cable
connector
Terminals 1 to 8 are
defined in
sequence as
follows: SPK-, SPK
+, 0V, CALL,
NUA/UA, ALM,
ALM-, and ALM+.
When the equipment alarm
output is connected to this
terminal, the lightning protection
failure alarm is directly sent to
the OTNM2000.
XS13
XS14
Cabinet Alarm Indicator Terminal
XPB2 is the terminal for Outputting the signals triggered by the cabinet indicators.
Pins from top to bottom are defined as follows: green power indicator (-, +); yellow
indicator for non-critical alarms (-, +), and red indicator for critical alarms (-, +).
Alarm Terminal of the Head of Row Cabinet
XPB1 is an alarm terminal of the head of row cabinet. The three pins from the top
down output the CALL, NUA, and UA signals, respectively.
Lightning Protection Failure Alarm Terminal
The lightning protection failure alarm signal is sent to the equipment through the
XS1 terminal on the PDP.
Buzzer
SPK1 can generate audio alarms.
2.6
Lightning Protection Module
The lightning protection module (card No.: 3.578.403/7.200.038) uses a standard
DB-25 plug to connect to the lightning protection module sockets (XS11 and XS12).
It can withstand a voltage surge of differential mode 2 kV (1.2/50 us to 8/20 us
combination wave) or common mode 4 kV (1.2/50 us to 8/20 us combination wave)
to ensure normal operation of the equipment.
Figure 2-5 shows the lightning protection module.
2-8
Version: A
