Interphase Tech ispan 5535 pri Manual Do Utilizador
Appendix F: Using the LineStatus Utility
iSPAN PRI PCI ISDN Users Guide
111
Alarm LEDs
The following alarm LEDs indicate connection problems that
result from line failures:
result from line failures:
LED
Meaning
LOS
Loss of Signal. Typically appears when no electrical signal is
detected. (check if line is plugged on the adapter and on the
network interface).
detected. (check if line is plugged on the adapter 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.
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.
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.
Transmitted in the outgoing direction when a terminal
determines that it has lost the incoming signal.