Comtech EF Data SMS-7000 - Manual (Page 41)

SMS-7000 Modem Protection Switch Installation
Rev. 3 2–7
2.3 Mounting
Prior to installing the switch in the customer equipment rack, an appropriate mounting
configuration must be defined. The switch components are designed for a variety of
mounting options to accommodate different user requirements.
The Switch Control Unit (SCU) chassis is a one unit (1U), 19-inch (48.3 cm) rack-
mountable unit intended for mounting at eye level in the front of the rack. The keypad
and display on the front panel of the SCU provide single-point control for all modems
associated with the switch, as well as for the switch.
The Data Switch Unit (DSU) and IF Unit (IFU) chassis may be mounted in various ways.
User application requirements determine which rack mounting option is used. The two
basic mounting locations are:
• Top mount
• Back mount
2.3.1 Description
2.3.1.1 Top Mount
This installation is intended for ceiling-routed cables, where terrestrial data harnesses
conveniently enter from the top of the rack. Installed on standard 19-inch (48.3 cm) rails
through an opening in the top of the rack, with the terrestrial interfaces facing up, this
configuration provides direct access to terrestrial data and IF ports at the top of the rack,
minimizing cabling within the rack.
2.3.1.2 Back Mount
This installation is intended for configurations where terrestrial data cables enter the top
and/or bottom of the rack. A back mount (hinge) kit is used to facilitate installation and
service access. The DSU and IFU are mounted directly inside the rear door of the rack.
The hinged switch chassis, when pitched out at the rear of the rack, provides access to
both the rear of the front panel-mounted equipment and the inside face of the switch.