Electrical Interface Adapters; Figure 1-22 Ds-1 Electrical Interface Adapter (Balun) - Cisco 15454-DS1-14= - 1.544Mbps Expansion Module Reference Manual

Chapter 1 Shelf and Backplane Hardware
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 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.

1.7.2 Electrical Interface Adapters

DS-1 electrical interface adapters project an additional 1.72 inches (43.7 mm) from the ONS 15454
Note
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 adapter has wire-wrap posts for DS-1 transmit and receive cables.
Figure 1-22
"EIA" refers to electrical interface assemblies and not electrical interface adapters. Electrical interface
Note
adapters are also known as baluns.
Figure 1-22
SMB Connector
Electrical
interface
adapter
Each DS-1 electrical interface adapter has a female SMB connector on one end and a pair of 0.045 inch
(1.14 mm) square wire-wrap posts on the other end. The wire-wrap posts are 0.200 inches (5.08 mm)
apart.
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.
78-18106-01
shows the DS-1 electrical interface adapter.
DS-1 Electrical Interface Adapter (Balun)
DS-1
Wire wrap posts
Ring
Tip
1.7.2 Electrical Interface Adapters
Cisco ONS 15454 Reference Manual, R8.5
1-39