Alarm Cutoff; Timing Installation; Table 1-2 External Timing Pin Assignments For Bits - Cisco ONS 15327 User Documentation

Chapter 1 Hardware Installation
Procedure: Attach Ferrites to Power Cabling
Use a single block ferrite Fair Rite 0443164151 for each pair of cables.
Step 1 Wrap the cables once around and through the block ferrites.
Place the block ferrite within 5 to 6 inches of the power terminals.
Step 2

1.6 Alarm Cutoff

Visual and audible alarms are typically wired to trigger an alarm light at a central alarm collection point
when the corresponding contacts are closed. The alarm cutoff (ACO) function stops (turns off) the alarm
signal being transmitted to the alarm collection point.
To activate the ACO function, press the ACO button on the XTC card faceplate. The ACO button clears
all audible alarm indications. After clearing the audible alarm indication, the alarm is still present on the
Alarms tab in Cisco Transport Controller (CTC) and appropriate action is needed to clear the alarm. For
information about connecting to alarm collection equipment, See the
on page

1.7 Timing Installation

The ONS 15327 supports two Building Integrated Timing Supply (BITS) clock interfaces. The physical
connection is provided through an RJ-45 connector on each MIC. Two pins on each RJ-45 are used for
BITS timing. BITS 1 In (MIC A) and BITS 2 In (MIC B) use pins 3 and 4. BITS 1 Out (MIC A) and
BITS 2 Out (MIC B) use pins 7 and 8. The BITS 1 pins support output and input from the first external
timing device. The BITS 2 pins perform the identical functions for the second external timing device.
Table 1-2
connecting BITS timing to the ONS 15327, See the
Table 1-2
External Device
First external device
(MIC A)
June 2002
1-27. For procedures that resolve alarms, refer to
lists the pin assignments for the BITS timing pin fields. For more information about
External Timing Pin Assignments for BITS
Contact
BITS 1 Out
BITS 1 Out
BITS 1 In
BITS 1 In
Chapter 14, "Alarm Troubleshooting."
"BITS Cable Installation" section on page
RJ-45 Pin Tip & Ring
7 Primary ring (-)
8 Primary tip (+)
3 Secondary ring
(-)
4 Secondary tip
(+)
Cisco ONS 15327 User Documentation, R3.3
Alarm Cutoff
"Alarm Cable Installation" section
Function
Output to external
device
Output to external
device
Input from external
device
Input from external
device
1-28.
1-15