Eia Installation; Eia Configurations; Table 1-1 Eia Types Compatible With The 15454-Sa-Ansi Only - Cisco 15454-DS1-14= - 1.544Mbps Expansion Module Reference Manual

1.5.1 EIA Installation

1.5.1 EIA Installation
Optional EIA backplane covers are typically preinstalled when ordered with the ONS 15454. A minimal
amount of assembly might be required when EIAs are ordered separately from the ONS 15454. 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 connectors. 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.
When using the RG-179 coaxial cable on an EIA, the maximum distance available (122 feet [37 meters])
is less than the maximum distance available with standard RG-59 (734A) cable (306 feet [93 meters]).
The maximum distance when using the RG-59 (734A) cable is 450 feet (137 meters). The shorter
maximum distance available with the RG179 is due to a higher attenuation rate for the thinner cable.
Attenuation rates are calculated using a DS-3 signal:
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1.5.2 EIA Configurations

Table 1-1
Table 1-1 EIA Types Compatible with the 15454-SA-ANSI Only
Cards A-Side
EIA Type Supported Hosts
BNC DS-3 24 pairs of
DS3XM-6 BNC
EC-1 connectors
High- DS-3 48 pairs of
Density DS3XM-6 BNC
BNC EC-1 connectors
Cisco ONS 15454 Reference Manual, R8.5
1-16
For RG-179, the attenuation rate is 59 dB/kft at 22 MHz.
For RG-59 (734A) the attenuation rate is 11.6 dB/kft at 22 MHz.
shows the EIA types supported only by ONS 15454 shelf assembly 15454-SA-ANSI.
A-Side
Columns
Map to A-Side Product Number
Slot 2 15454-EIA-BNC-A24=
Slot 4
Slot 1 15454-EIA-BNC-A48=
Slot 2
Slot 4
Slot 5
Chapter 1 Shelf and Backplane Hardware
B-Side
B-Side Columns
Hosts Map to B-Side Product Number
24 pairs of Slot 14 15454-EIA-BNC-B24=
BNC
Slot 16
connectors
48 pairs of Slot 13 15454-EIA-BNC-B48=
BNC
Slot 14
Slot 16
Slot 17
78-18106-01