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Cisco ONS 15310-MA SDH Reference Manual, Release 9.1 and Release 9.2
78-19417-01
Chapter 1 Cisco ONS 15310-MA SDH Shelf Assembly Hardware
Electrical Interface Assemblies

1.2.3 Mounting Multiple Nodes

Most standard 2200 mm racks can hold numerous (up to 6 or 7) ONS 15310-MA SDH nodes and a fuse
and alarm panel.
1.3 Electrical Interface Assemblies
High-density EIAs are attached to the ONS 15310-MA SDH shelf assembly backplane to provide up to
126 transmit and receive E1 connections through six Champ connectors per side (A and B) or six
transmit and receive E3/DS3 connections through six BNC connectors per side. The EIAs are designed
to support E1, E3/DS3 signals. The appropriate cable assembly is required depending on the type of
signal.
You can install EIAs on one or both sides of the ONS 15310-MA SDH. As you face the rear of the shelf
assembly, the right side is the A side (15310-EIA-HD-A) and the left side is the B side
(15310-EIA-HD-B).
Figure 1-3 shows the J connectors on the A- and B-side high-density EIAs installed on the
ONS 15310-MA SDH.