Cisco Systems MGX 8230 manual Led

Appendix A Technical Specifications

MGX 8230 Processor Switching Module Specifications

Table A-2 PXM Specifications (continued)

Category	Description
LEDs on PXM front	Status for the card:
card:	•	Green means active.
LEDs display status, but	•	Red means failed.
alarm history is a switch.
	• Yellow indicates the standby card.
	LAN activity: flashing green indicates activity.
	Node alarm:
	• Red indicates major alarm.
	• Yellow indicates minor alarm.
	Node power (note that each AC power supply also has an
	LED):
	• “DC OK A” is green for okay or red for trouble.
	• “DC OK B” is green for okay or red for trouble.
	Alarm history: ACO
	Port interface (per port):
	• Green means active and okay.
	• Red means active and local alarm.
	• Yellow means active and remote alarm.
	• No light means inactive or not provided.
LEDs on back cards:	Green means active. No light means inactive or not provided.
Stratum 4	8 KHz clock derived from:
synchronization (internal	• Internal 8 KHz clock (10 ppm).
only):
Stratum 3	• Free-Run Accuracy of +/- 4.6 ppm (+/- 7 Hz @
synchronization (internal		1.544 MHz)
and external):	• Holdover stability of less than 255 slips (+/- .37 ppm ) for
		the initial 24 hours of holdover.
	• Upon clock switchover, MTIE (Maximum Time Interval
		Error) shall not exceed 1 microsecond. The rate of phase
		change shall not exceed 81 ns in 1.326 ms interval.
	• Pull-in range of accuracy +/- 4.6 ppm.
	• Provide jitter filtering and tolerate jitter according to
		AT&T T1.5 and ITU G.824 specifications.
	• Declare a bad reference if LOS detected >50 ms or error
		burst of duration >2.5 sec.
BITS clock interface:	T1 and E1 with an RJ-45 connector.
	Note: older systems with a PXM-UI back card have an SMB
	connector for E1.

	Cisco MGX 8230 Edge Concentrator Installation and Configuration
A-4	Release 1.1.31, Part Number 78-11215-03 Rev. B0, May 2001