Cisco Systems 15454M6DC Procedure: Install DS-1 Cables Using Electrical Interface Adapters (Balun)

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Cisco ONS 15454 Installation and Operations Guide
November 2001
Chapter1 Hardware Installation
DS-1 Cable Installation
Caution Always use the supplied ESD wristband when working with a powered ONS 15454. Plug the
wristband cable into the ESD jack located on the lower-right outside edge of the shelf assembly.
If you use DS-1 electrical twisted-pair cables, equip the ON S 15 454 w ith a n SM B EIA o n ea ch si de of
the backplane where DS-1 cables will terminate. You must install special DS-1 electrical interface
adapters, commonly referred to as a balun, on every transmit and recei ve co nnecto r for eac h DS-1
termination.
Note DS-1 electrical interface adapters project an additional 1.72 inches from the ONS 15454 backplane.
If you install DS-1 cards in the ONS 15454, you must fit the corresponding transmit and receive SMB
connectors on the EIA with a DS-1 electrical interface adapter. You can install the adapter on the SMB
connector for the port. The adaptor has wire-wrap posts for DS-1 transmit and receive cables.
Figure 1-27 shows the DS-1 electrical interface adapter.
Figure 1-27 DS-1 electrical interface adapter (balun)
Each DS-1 electrical interface adapter has a female SMB connector on one end and a pair of .045 inch
square wire-wrap posts on the other end. The wire-wrap posts are .200 inches apart.
Procedure: Install DS-1 Cables Using Electrical Interface Adapters (Balun)
All DS-1 cables connected to the ONS 15454 DS-1 ports must terminate with twisted-pair cables to
connect to the DS-1 electrical interface adapter. The DS-1 electrical interface adapters project 1.72
inches beyond the SMB EIA.
Step 1 Attach the SMB connector on the adapter to the SMB connector for the port’s transmit pair on the
backplane.
Step 2 Attach the SMB connector on an adapter to the SMB connector for the port’s receive pair on the
backplane.
Step 3 Terminate the DS-1 transmit and receive cables for the port to the wire-wrap posts on the adapter:
a. Using a wire-wrap tool, connect the receive cables to the receive adapter pins on the backplane
connector for the desired port.
b. Connect the transmit cables to the transmit adapter pins on the backplane connector for the desired
port.
SMB Connector Wire wrap posts
DS-1
Electrical
interface
adapter
Ring
Tip
32071