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Cisco ONS 15454 Installation and Operations Guide
November 2001
Chapter1 Hardware Installation
EIA Installation
1.6 EIA Installation
Optional EIA backplane covers are typically pre-installed when ordere d with the ONS 15454. EIAs must
be ordered when using DS-1, DS-3, DS3XM-6, or EC-1 cards. A minimum amount of assembly m ay be
required when EIAs are ordered separately from the ONS 15454. Four different EIA backplane covers
are available for the ONS 15454: BNC, High-Density BNC, SMB, and A MP Cha m p. Th is sect ion
describes each EIA in detail.
EIAs are attached to the shelf assembly backplane to provide coaxial cable connections. EIAs are
available with SMB and BNC connectors for DS-3 or EC-1 cards. EIAs are av aila ble with AMP Champ
connectors for DS-1 cards. You must use SMB EIAs for DS-1 twisted-pair cable insta llat ion. You can
install EIAs on one or both sides of the ONS 15454 backplane in any comb ination (in other words, AMP
Champ on Side A and BNC on Side B or High-Density BNC on side A and SMB on side B, and so forth).
If you are installing EIAs after the shelf assembly is installed, plug the EIA into the backplane. The EIA
has six electrical connectors that plug into six corresponding backplane conn ectors. The EIA backplane
must replace the standard sheet metal cover to provide access to the coaxial cable connectors. The EIA
sheet metal covers use the same screw holes as the solid backplane panels, but they have 12 additional
6-32 x 1/2 inch phillips screw holes so you can screw down the cover and the board using standoffs on
the EIA board. This section describes each EIA and provi des i n stall ation pr oced ur es.
For EIA replacement procedures, refer to the Cisco ONS 15454 Troubleshooting and Maintenance
Guide. For information about attaching ferrites to EIA connectors, see the “Ferrite Installation” section
on page 1-61.

1.6.1 BNC EIA

The ONS 15454 BNC EIA supports 24 DS-3 circuits on each side of the ONS 15454 (24 transmit and
24 receive connectors). If you install BNC EIAs on both sides of the shelf assembly, the ONS 15454
hosts up to 48 circuits. The BNC connectors on the EIA supports Trompeter UCBJ224 (75 Ohm) 4 leg
connectors (King or ITT are also compatible). You can use BNC EIAs for DS-3 (including the
DS3XM-6) or EC-1 cards. Figure 1-39 shows the ONS 15454 with pre-installed BNC EIAs.
To install coaxial cable with BNC connectors, see the “BNC Connector Installation” section on
page 1-36.