Cisco Laser Link Ancillary Modules 安装指南
3-14
Setup and Operation
78-4028521-01 Rev B
Alarm Tables,
Continued
1310 nm Reverse Transmitters Alarm Table
Models
(front panel
label)
Description
Vital Sign
VS#/Pin#
Vital Sign Description
Logic
XMTR
5-200 MHz
Laser Link II return
transmitter, rear
panel optical
connector
#1/#5
#2
#3/#12
#4/#4
Redundant Power Alarm
– active when module
detects loss of +24 V DC
“A” supply
No connection on this
No connection on this
module
Laser Temp./Laser Bias –
Laser Temp./Laser Bias –
alarm when laser
temperature or laser bias
current is out of range
Global Alarm – any above
Global Alarm – any above
condition and +5 or -5 V
DC fails
0 V = normal
+5 V = alarm
No connection
0 V = normal
5 V = alarm
24 V = normal
0 V = alarm
LLRT
5-210 MHz
Laser Link LLRT 5-
210 MHz return
transmitter, front
panel optical
connector, rear panel
fan
#1/#5
#2/#11
#3/#12
#4/#4
Redundant Power Alarm
– active when module
detects loss of +24 V DC
“A” supply
Optical Output Power
Laser Bias Current
Global Alarm – +5 V DC
Optical Output Power
Laser Bias Current
Global Alarm – +5 V DC
fails, laser temp ±5%, laser
bias current ±20%, optical
power – 25%, “A” supply
fails
0 V = normal
+5 V = alarm
1 V/mW
1 V/50 mA
24 V = normal
0 V = alarm