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B-11
Cisco MGX 8800/8900 Series Hardware Installation Guide
Releases 2 - 5.2, Part Number OL-4545-01, Rev. H0, May 2006
Appendix
Power Cabling
Pin States for Each Alarm State
Table B-10 summarizes which pins are open (open circuit) and which pins are closed (short circuit) for
each alarm state.
Power Cabling
This section provides information on providing AC and DC power cabling for the MGX switch.
Critical Visual Alarm On 2 — — S O
Critical Visual Alarm Common 10 — — Common Common
Critical Visual Alarm Off 3 — — O S
Major Audio Alarm On 11 S O — —
Major Audio Alarm Common 4 Common Common — —
Major Visual Alarm On 12 — — S O
Major Visual Alarm Common 5 — — Common Common
Major Visual Alarm Off 13 — — O S
Minor Audio Alarm On 6 S O — —
Minor Audio Alarm Common 14 Common Common — —
Minor Visual Alarm On 7 — — S O
Minor Visual Alarm Common 15 — — Common Common
Minor Visual Alarm Off 8 — — O S
1. S = Signal is shorted with Common
2. O = Signal is opened
Table B-9 PXM-UI-S3 Pin Assignment on the ALARM Connector (continued)
Pin Name Pin No. Audio Enable Audio Disable Visual Enable Visual Disable
Table B-10 Pin States for Each Audio and Visual Alarm State
Alarm Alarm State Pin Pin State
Audio alarm Enabled Audio Alarm On Closed
Audio Alarm Common Closed
Disabled Audio Alarm On Open
Audio Alarm Common Open
Visual alarm Enabled Visual Alarm On Closed
Visual Alarm Common Closed
Visual Alarm Off Open
Disabled Visual Alarm On Open
Visual Alarm Common Closed
Visual Alarm Off Closed