Cisco Systems ONS 15600 manual Timing Installation, Alarm Cutoff and PDU Alarms

Chapter 1 Shelf and Backplane Hardware

1.7.2 Timing Installation

Figure 1-9 Alarm Pin Assignments on the CAP

Normally closed

Common

Normally open

	- B				EXTERNAL							ALARMS						- A
5	BITS	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	BITS	5
4																			4
3																			3
2																			2
1																			1
	10		9		8		7		6		5		4		3		2		1
				FRAME										GROUND

78510

Short for alarm,	Alarm IN
-48 VDC provided	48 VDC provided
	short contacts

Visual and audible alarms can be wired to trigger an alarm light at a central alarm collection point when the corresponding contacts are closed.

1.7.1.2 Alarm Cutoff and PDU Alarms

The PDU Alarm connection controls the visual alarm indicators on the front of the PDU. You can also activate the alarm cutoff (ACO) function by pressing the ACO button on the TSC card faceplate. The ACO function extinguishes all audible alarm indications, but the alarm is still raised in Cisco Transport Controller (CTC).

1.7.2 Timing Installation

The ONS 15600 backplane supports two 100-ohm BITS clock pin fields. Figure 1-10shows the pin assignments for the BITS timing pin fields.

Note Refer to Telcordia SR-NWT-002224 for rules about provisioning timing references.

Note 64K and E1 timing are not used with SONET systems.

Cisco ONS 15600 Reference Manual, R7.2

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