1-38
Cisco ONS 15454 Reference Manual, R7.0.1
OL-9217-01
Chapter 1 Shelf and Backplane Hardware
1.7 1.7.2 Electrical Interface Adapters
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
Note DS-1 electrical interface adapters project an additional 1.72 inches (43.7 mm) 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 adapter has wire-wrap posts for DS-1 transmit and receive cables.
Figure 1-22 shows the DS-1 electrical interface adapter.
Note “EIA” refers to electrical interface assemblies and not electrical interface adapters. Electrical interface
adapters are also known as baluns.
Figure 1-22 DS-1 Electrical Interface Adapter (Balun)
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.
SMB Connector
Wire wrap posts
DS-1
Electrical
interface
adapter
Ring
Tip
32071
To Next Page
Loading...
