Appendix E: Line Status Utility
5536 PRI RAS Communications Controller Users Guide
173
Alarm LEDs
The following alarm LEDs indicate connection problems that
result from line failures:
LED
Meaning
LOS
Loss of Signal. Typically appears when no electrical signal is
detected. (Check if the line is plugged in on the board and on the
network interface).
LOF
Loss of Frame (also known as
Red Alarm
). Appears when many
frames are lost because of framing errors. The terminal is unable
to synchronize on the DS1 signal.
AIS
Alarm Indication Signal (also known as
Blue Alarm
).
Transmitted instead of the normal signal to maintain
transmission continuity. Also indicates to the receiving
equipment that a transmission interruption occurred either at the
equipment originating the AIS signal, or upstream of the
originating equipment.
RAI
Remote Alarm Indication (also known as
Yellow Alarm
).
Transmitted in the outgoing direction when a terminal
determines that it has lost the incoming signal.
Summary of Contents for ENTIA 5536 DM PRI
Page 34: ...Minimum System Requirements 14 Interphase Corporation...
Page 46: ...Connecting to an MVIP Bus 26 Interphase Corporation...
Page 56: ...Connecting to the Network 36 Interphase Corporation...
Page 90: ...Removing the Drivers 70 Interphase Corporation...
Page 136: ...Verifying COM Ports 116 Interphase Corporation...
Page 172: ...Saving and Editing Frames 152 Interphase Corporation...
Page 182: ...Understanding LoopTest Messages 162 Interphase Corporation...
Page 190: ...Setting Port and Clock Modes 170 Interphase Corporation...
Page 196: ...Interpreting Line Status Indicators 176 Interphase Corporation...
Page 208: ...Procedures 188 Interphase Corporation...
Page 220: ...Europe 200 Interphase Corporation...