To the Holder of the Manual The contents of this publication are current as of the date of publication. ADTRAN® reserves the right to change the contents without prior notice. In no event will ADTRAN be liable for any special, incidental, or consequential damages or for commercial losses even if ADTRAN has been advised thereof as a result of issue of this publication. ® 901 Explorer Boulevard P.O. Box 140000 Huntsville, AL 35814-4000 (256) 963-8000 ©2005 ADTRAN, Inc. All Rights Reserved. Printed

Figure 2. Cable for OPTI-3, MX2810, and NIU3 The Total Access PSU powers a single bus (select either A or B). Connect the ring-type terminals to the respective terminals on the rear of the chassis using the screws provided. Use the following wiring conventions: RED -48VA or PWR BLACK RET GREEN Ground Terminal Table 2. Wiring (OPTI-3, MX2810, NIU3) Connect the DC wiring harness of the Total Access PSU to the adapter using the modular connectors and plug the AC plug into the AC power source. MX281

1 2. DESCRIPTION............................................................ 1 3. INSTALLATION......................................................... 2 4. BATTERY BACKUP OPERATION .......................... 4 5. COMPLIANCE CODES.............................................. 5 6. MAINTENANCE ........................................................ 5 7. WARRANTY AND CUSTOMER SERVICE ............ 5 FIGURES Figure 1. AC/DC Power Supply and Battery Charger.......1 Figure 2. Cable for OPTI-3, MX2810

GENERAL ................................................................... 1 2. DESCRIPTION ............................................................ 1 3. INSTALLATION.......................................................... 2 4. SPECIFICATIONS....................................................... 4 5. MAINTENANCE......................................................... 4 6. WARRANTY AND CUSTOMER SERVICE .............. 4 Figures Figure 1. TA 750/850 PS/BC, Front and Back ..................

SAFETY INFORMATION When using your telephone equipment, please follow these basic safety precautions to reduce the risk of fire, electrical shock, or personal injury: 1. Do not use this product near water, such as a bathtub, wash bowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool. 2. Avoid using a telephone (other than a cordless-type) during an electrical storm. There is a remote risk of shock from lightning. 3. Do not use the telephone to report a gas leak in the vicin