2
Section 61212070L2-5, Issue 1
61212070L2-5A
The rear panel has portals for power and ground
wires, plus four BNC connectors:
• two for network transmit/receive
• two for customer transmit/receive
All front and rear panel items are clearly labeled. A
wire-tie anchor point is also on the rear panel. See
Figure 2
for rear panel arrangement.
2. INSTALLATION
After unpacking the unit inspect it for damage. If
damage is noted, file a claim with the carrier, then
contact ADTRAN. Refer to
Warranty and Customer
Service.
Location
The NIU3 is designed for installation between the
ADM and customer equipment. The NIU3 can pass
both network and customer signals up to 900 feet.
However, if either distance exceeds 450 feet, the
respective front panel monitoring signal begins to
degrade. Also, during NIU3 bypass operations, if total
transmission distance exceeds 900 feet, signal quality
may degrade. See
Figure 3
for NIU3 network
arrangement and maximum recommended signal
distance.
Figure 3. NIU3 Circuit Arrangement
Figure 2. NIU3 Standalone Rear Panel
IN Indicates Receive from Network or Customer.
OUT Indicates Transmit to Network or Customer.
OUT
IN
OUT
CERT. TO CAN/CSA STD.
C22.E.NO. 225-950
99202271
CONF. TO ANSI/UL
STD 1950
IN
POWER
CUSTOMER
48V , 125mA
NETWORK
1212070L2
C A U T I O N
C A U T I O N !
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.
