Black Box 5000 manual Appendix E Indicators, Definition Off Flashing

Appendix E: Indicators

Appendix E: Indicators

AT BO A6 A5 A4 A3 A2 A1

Figure E-1. CCM Indicator Positions.

Table E-1. CCM Indicators.

CCM LED	Indicator
Indicator	Definition	Off	Flashing	On
AT	Active Mode	Indicates a fault or	The unit is in a loopback	Normal operation
		test condition	test mode
BO	Buffer Overflow	Buffer utilization is	Buffer utilization	Data has been lost
		normal	exceeding 87%	because of a buffer
				overflow
A1	Port A1	Error-free data is	High error rate on link	Receiving own transmit
		passing through	or synchronization	data; modem is in
		the link	has been lost with the	loopback
			remote unit on the link
A2*	Port A2	No data activity	Data activity	Data activity
A3*	Port A3	No data activity	Data activity	Data activity
A4*	Port A4	No data activity	Data activity	Data activity
A5*	Port A5	No data activity	Data activity	Data activity
A6*	Port A6	No data activity	Data activity	Data activity

* If configured as a link, the indicator values are the same as for A1.

NOTE: The indicator on a force-connected sync port using either

Fast Packet or TDM protocols will remain on continuously.

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