ADTRAN 1200218L1, User Manual

Page: 27 / 122

Chapter 2. Installation and Operation
61200663L1-1 OSU 300 User Manual 2-3
Desktop Installation
Follow these steps when using your OSU 300 as a desktop unit:
1. Affix the four adhesive-backed rubber feet to the bottom of the
unit, one on each of the four corners. The feet should be placed
approximately one inch from the front or back and one inch
from the sides of the unit
2. Make all network, DTE, and power connections to the rear of
the unit. See the section Powering the Unit on page 2-8 for more
information on making the DC power connection.
3. Using the 8-position modular to DB-25 female connector and
the 8-position modular to 8-position modular cable, connect a
VT-100 terminal device to the
CONTROL interface jack on the
front panel of the unit.
REVIEWING THE REAR PANEL
The OSU 300 rear panel contains a DC terminal block and provides
a strain relief nylon plug that allows you to tie off the input power
cable, thus relieving strain on the cable. The rear panel also
provides three expansion slots, a built-in HSSI interface, an alarm
output terminal block, a LAN port, an optical interface with sliding
door, and a removable dust cover for the optical interface. Pin
assignments for the connectors are given in Appendix A. Figure 2-1
on page 2-4 shows the OSU 300 rear panel, and Figure 2-2 on page
2-4 shows the movement of the optical interface door.