1-15
Cisco ONS 15327 User Documentation, R3.3
June 2002
Chapter 1 Hardware Installation
Alarm Cutoff
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.
Step 2
Place the block ferrite within 5 to 6 inches of the power terminals.
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
“Alarm Cable Installation” section
. For procedures that resolve alarms, refer to
Chapter 14, “Alarm Troubleshooting.”
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.
lists the pin assignments for the BITS timing pin fields. For more information about
connecting BITS timing to the ONS 15327, See the
“BITS Cable Installation” section on page 1-28
Table 1-2
External Timing Pin Assignments for BITS
External Device
Contact
RJ-45 Pin
Tip & Ring
Function
First external device
(MIC A)
BITS 1 Out
7
Primary ring (-)
Output to external
device
BITS 1 Out
8
Primary tip (+)
Output to external
device
BITS 1 In
3
Secondary ring
(-)
Input from external
device
BITS 1 In
4
Secondary tip
(+)
Input from external
device
Summary of Contents for ONS 15327
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Page 30: ...Figures xxviii Cisco ONS 15327 User Documentation June 2002 ...
Page 44: ...Procedures xlii Cisco ONS 15454 Installation and Operations Guide R3 2 June 2002 ...
Page 540: ...Glossary GL 16 Cisco ONS 15327 User Documentation R3 3 June 2002 ...