ADTRAN 1200218L1, User Manual

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Chapter 2. Installation and Operation
61200663L1-1 OSU 300 User Manual 2-5
Strain Relief
To relieve strain on the input power cable, the nylon plug ties off
the power cable.
DC Terminal Block
The three-position DC terminal block accommodates 12 to 26 AWG
wire. The positive (+) and negative (-) terminals connect to a 24 to
48 VDC, 0.4A power source. Figure 2-3 illustrates the terminal
block power connector, along with definitions for the three
connector symbols.
Figure 2-3. DC Power Connector
DTE Ports 2-4 (Expansion Slots)
The OSU 300 rear panel contains three expansion slots (DTE ports
2-4) for installing optional interface cards. Currently available cards
include the HSSI card (P/N 1200218L1), the V.35 card
(P/N 1200219L1), and the Quad DSX-1 card (P/N 1200284L1). To
insert the cards, follow these steps:
1. Remove the appropriate slot cover from the empty slot.
2. Slide the card into the empty slot until the card panel is flush
with the OSU 300 chassis.
3. Push in the thumbscrews and turn clockwise to secure the card
and ensure proper connection to the main board of the OSU
300.
Symbol Definition
Frame ground.
+ Positive side of DC power source
(usually ground).
- Negative side of DC power
source (usually -48V).