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1.16.2 Timing Connections
Visual and audible alarms are typically wired to trigger an alarm light or bell at a central alarm collection
point when the corresponding contacts are closed. You can use the Alarm Cutoff pins to activate a remote
ACO for audible alarms. You can also activate the ACO function by pressing the ACO button on the
TCC2/TCC2P card faceplate. The ACO function clears all audible alarm indications. After clearing the
audible alarm indication, the alarm is still present and viewable in the Alarms tab in CTC. For more
information, see the
1.16.2 Timing Connections
The ONS 15454 backplane supports two building integrated timing supply (BITS) clock pin fields. The
first four BITS pins, rows 3 and 4, support output and input from the first external timing device. The
last four BITS pins, rows 1 and 2, perform the identical functions for the second external timing device.
Table 1-29
Note
For timing connection, use 100-ohm shielded BITS clock cable pair #22 or #24 AWG (0.51 mm² [0.020
inch] or 0.64 mm² [0.0252 inch]), twisted-pair T1-type.
Table 1-29
External Device
First external device
Second external device
Note
Refer to Telcordia SR-NWT-002224 for rules about provisioning timing references.
For more information, see
1.16.3 LAN Connections
Use the LAN pins on the ONS 15454 backplane to connect the ONS 15454 to a workstation or Ethernet
LAN, or to a LAN modem for remote access to the node. You can also use the LAN port on the
TCC2/TCC2P card faceplate to connect a workstation or to connect the ONS 15454 to the network.
Table 1-30
Before you can connect an ONS 15454 to other ONS 15454s or to a LAN, you must change the default
IP address that is shipped with each ONS 15454 (192.1.0.2).
Cisco ONS 15454 Reference Manual, R8.5
1-70
"2.7.2 External Alarms and Controls" section on page
lists the pin assignments for the BITS timing pin fields.
BITS External Timing Pin Assignments
Contact
A3 (BITS 1 Out)
B3 (BITS 1 Out)
A4 (BITS 1 In)
B4 (BITS 1 In)
A1 (BITS 2 Out)
B1 (BITS 2 Out)
A2 (BITS 2 In)
B2 (BITS 2 In)
Chapter 10, "Timing."
shows the LAN pin assignments.
Chapter 1
2-30.
Tip and Ring
Function
Primary ring (–)
Output to external device
Primary tip (+)
Output to external device
Secondary ring (–)
Input from external device
Secondary tip (+)
Input from external device
Primary ring (–)
Output to external device
Primary tip (+)
Output to external device
Secondary ring (–)
Input from external device
Secondary tip (+)
Input from external device
Shelf and Backplane Hardware
78-18106-01
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