Procedure: Install Ds-1 Cables Using Electrical Interface Adapters (Balun); Figure 1-27 Ds-1 Electrical Interface Adapter (Balun) - Cisco 15454-TCC - Network Processor Card Operation Manual

DS-1 Cable Installation
Always use the supplied ESD wristband when working with a powered ONS 15454. Plug the
Caution
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 ONS 15454 with an SMB EIA on each side 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 receive connector for each 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

Figure 1-27 DS-1 electrical interface adapter (balun)

SMB Connector
Electrical
interface
adapter
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.
Attach the SMB connector on the adapter to the SMB connector for the port's transmit pair on the
Step 1
backplane.
Attach the SMB connector on an adapter to the SMB connector for the port's receive pair on the
Step 2
backplane.
Terminate the DS-1 transmit and receive cables for the port to the wire-wrap posts on the adapter:
Step 3
a.
b.
Cisco ONS 15454 Installation and Operations Guide
1-40
shows the DS-1 electrical interface adapter.
DS-1
Using a wire-wrap tool, connect the receive cables to the receive adapter pins on the backplane
connector for the desired port.
Connect the transmit cables to the transmit adapter pins on the backplane connector for the desired
port.
Wire wrap posts
Ring
Tip
Chapter 1 Hardware Installation
November 2001