3Com T1/PRI manual Correcting Alarm/Error Conditions, Alarm/Error Level Trouble Clearing

Correcting

Alarm/Error

Conditions

Using the LEDs A-3

Alarm/Error	Level	Trouble Clearing
Remote Frame Alarm	Yellow	■	Verify that the NAC is configured
(RFA)			properly according to the services
			provisioned by the Telco. Contact the
			Telco if necessary.
		■ Check the cables—do not use a flat
			cable.
		■ Check break-out boxes.
		■ Examine boot-up test results.
		■	Examine error counters.
Loss of Signal (LOS)	N/A	■	Verify that the span is plugged into
			the NIC properly.
		■ If the cabling is correct, there is most
			likely a problem at the Telco. Contact
			the Telco for service.
		■ Check the cables—do not use a flat
			cable.
		■ Check break-out boxes.
		■ Examine boot-up test results.
		■	Examine error counters.
Out-of-Frame (OOF)	Red	■	Verify that the NAC is configured
			properly according to the services
			provisioned by the Telco.
		■ If your configuration is correct, there
			may be a problem with the Telco’s
			equipment. Contact the Telco for
			service. Check the cables—do not use
			a flat cable.
		■ Check break-out boxes.
		■ Examine boot-up test results.
		■	Examine error counters.
		■ Check framing mode configuration.
Unframed All Ones	Blue	■	Indicates a red alarm at the Telco.
(AIS)			Contact the Telco for service.
RFA and Continuous	N/A	■	Verify that the NAC is configured
CRC (CCRC) Errors			properly according to the services
			provisioned by the Telco.

(continued)