Patents and Trademarks ............................................................................................................................................ xxvi

Warnings, Cautions, and Notes ................................................................................................................................. xxvi

Recommended Standard Designations .................................................................................................................... xxvi

Safety and Compliance ................................................................................................................. xxvii

Electrical Safety and Compliance ............................................................................................................................. xxvii

Electrical Installation .................................................................................................................................................. xxvii

Fuses

.................................................................................................................................................................... xxvii

Grounding .................................................................................................................................................................. xxviii

Operating Environment .............................................................................................................................................. xxix

European Union Radio Equipment and Telecommunications Terminal Equipment (R&TTE) Directive

(1999/5/EC) and EN 301 489-1 .................................................................................................................................. xxix

European Union Electromagnetic Compatibility (EMC) Directive (2004/108/EC) .......................................... xxix

European Union Low Voltage Directive (LVD) (2006/95/EC) ............................................................................. xxx

European Union RoHS Directive (2002/95/EC) .................................................................................................... xxx

European Union Telecommunications Terminal Equipment Directive (91/263/EEC) .................................... xxx

CE Mark ..................................................................................................................................................................... xxxi

Product Support ............................................................................................................................ xxxi

Comtech EF Data Headquarters ..................................................................................................... xxxi

Warranty Policy ............................................................................................................................ xxxi

Limitations of Warranty ............................................................................................................................................. xxxii

Exclusive Remedies .................................................................................................................................................... xxxii

CHAPTER 1.

INTRODUCTION ............................................................................................ 1-1

1.1

Overview ............................................................................................................................ 1-1

1.1.1

Modem Features Overview ..................................................................................................................... 1-1

1.1.2

Functional Description.............................................................................................................................. 1-2

iii