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 1-26
lists the pin assignments for the BITS timing pin fields.
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 1-26: BITS External Timing Pin Assignments
External Device Contact Tip and Ring Function
First external device A3 (BITS 1 Out) Primary ring (-) Output to external device
B3 (BITS 1 Out) Primary tip (+) Output to external device
A4 (BITS 1 In) Secondary ring (-) Input from external device
B4 (BITS 1 In) Secondary tip (+) Input from external device
Second external device A1 (BITS 2 Out) Primary ring (-) Output to external device
B1 (BITS 2 Out) Primary tip (+) Output to external device
A2 (BITS 2 In) Secondary ring (-) Input from external device
B2 (BITS 2 In) Secondary tip (+) Input from external device
Note: Refer to Telcordia SR-NWT-002224 for rules about provisioning timing references.
For more information, see Timing.
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
1-27 shows the LAN pin assignments.
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).
Table 1-27: LAN Pin Assignments
Pin Field
Backplane
Pins
RJ-45
Pins
LAN 1 Connecting to data circuit-terminating equipment (DCE
1
, a hub or
switch)
B2 1
A2 2
B1 3
A1 6
LAN 1 Connecting to data terminal equipment (DTE) (a PC/workstation or
router)
B1 1
A1 2
B2 3
A2 6
1 The Cisco ONS 15454 is DCE.
ONS_15454_Reference_Manual_R8.5.x_--_Shelf_and_Backplane_Hardware
Timing Connections 54
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