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Warranty

: ADTRAN will replace or repair this product within the warranty period if it does not 

meet its published specifications or fails while in service. Warranty information can 

be found online at 

www.adtran.com/warranty

.

Trademarks:

 Brand names and product names included in this document are trademarks,

    registered trademarks, or trade names of their respective holders.

©2016 ADTRAN, Inc. All Rights Reserved.

*61287733F1-22E*

O

PTIONAL

 I

NSTALLATIONS

The following are optional installations available for the MDU: 

Optitap Installation

Fiber Splitter Installation

Opti-Tap Installation

If the MDU is equipped with an Opti-Tap Connector, refer to 

Figure 9

 an

perform the following steps:

1. Secure the Opti-Tap Connector to the housing as shown.
2. Clean each end of the fiber jumper cable using standard optical cleaning 

procedures and techniques.

3. Connect one end of the fiber jumper to the green SC connector on the 

bottom of the Electronics Module just to the left of the Standoff.

4. Connect the other end to the Opti-Tap Connector. 

Figure 9. OptiTap Installation

Fiber Splitter Installation

If required, install the Fiber Splitter (P/N 1187734G1) by completing the 
following steps:

1. Refer to 

Figure 10

 and remove the Mounting Plungers from the Fiber 

Splitter.

2. Refer to 

Figure 9

 and position the fiber Splitter against the inside of the 

MDU Housing below the Fiber Mounting bracket and secure using the 
Mounting Plungers.

CAUTION

!

LASER RADIATION
Do not view directly with optical instruments.
The ONT devices used with this product contain laser emitting modules. Refer
to the ONT’s documentation and labeling for any special requirements related
to the laser module.

3. Remove dust covers from only those connectors required on the fiber 

Splitter.

4. Clean each optical connection using appropriate optical cleaning 

procedures and techniques.

5. Refer to 

Figure 9

 and connect the incoming fiber to the PON port on the 

Fiber Splitter. If the OptiTap is being used, connect the fiber from the 
OptiTap to the PON port on the Fiber splitter.

6. Connect a fiber cable to one of the ONT ports on the Fiber Splitter and 

the other to the fiber connector on the ONT.

7. Repeat steps 3, 4 and 6 for each additional ONT.

F1

DSL/POTS 25-48

F2

F3

F4

Opti-Tap Connector
and Strain Relief 
(for reference only)

FiberSplitter
(for reference only)

Fiber Splitter
Mounting Bracket

Mounting Plunger

Fiber Routing 
Clips

Strain Relief
(for reference only)

Fiber Routing 
Tray (Included)

Strength Member
Clamp

Figure 10. Fiber Splitter Installation

8. Tie wrap all fiber cables (use the Fiber Routing Clips above the Fiber 

Splitter as shown in 

Figure 9

) and ensure all ONTs are functioning 

properly before closing and securing the MDU housing door.

Provisioning Options

Refer to the appropriate

 GPON OLT Installation and Maintenance Guide 

to 

provision the OLTs in the MDU.

M

AINTENANCE

The MDU does not require routine hardware maintenance for normal 
operation. ADTRAN does not recommend that repairs be attempted in the 
field. Repair services may be obtained by returning the defective unit to 
ADTRAN. Refer to the warranty for further information. Field support for 
software is provided through upgrade facilities.

S

PECIFICATIONS

Specifications for the MDU are as follows:

Electrical

Maximum Input voltage: 10.5 VDC to 14 VDC

Input Power: 100 watts

Physical

Height: 20.0 inches

Width: 14.0 inches

Depth: 9.5 inches

Weight: 25 pounds depending on number of ONT modules

Environmental

Maximum operating temperature: –40°C to +46.1°C

Maximum storage temperature: –40°C to +85°C

Relative humidity: 95% non condensing

S

AFETY

 

AND

 R

EGULATORY

 C

OMPLIANCE

For Safety and Regulatory Compliance Notice information refer to the 

Total 

Access 480 MDU Safety and Regulatory Compliance Notice

 (P/N 61287733F1-17).

ONT

Mounting Plungers

ONT

PON

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.

 

ADTRAN CUSTOMER CARE:

From within the U.S.     1.800.726.8663

From outside the U.S. +1 256.963.8716

PRICING AND AVAILABILITY  1.800.827.0807

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