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However, changes made to the equipment or software described herein do not necessarily render this publication invalid. © 1999 Telrad Telecommunications Inc., Woodbury, New York CONTENTS WHAT IS IMAGEN? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 BASIC CONCEPTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 WHAT IS A MAILBOX? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 SOFTKEYS . . . . . . . . . . . . . .