27 lines
1.6 KiB
Plaintext
27 lines
1.6 KiB
Plaintext
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PART VII. THE ELECTRONIC SERIAL NUMBER - AN INTRODUCTION
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When a cellular phone is removed from factory packaging, the ESN
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normally can be found in the document package (or on a sticker stuck to the
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phone). This ESN is usually correct and system registration procedes
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quickly. If the phone is used or has been turned off for non-payment of
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bills, the person who restores the service needs the ESN in order to program
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the system with an MIN. Every manufacturer assigns their own ESN,
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consequently it is possible to have a number of the same ESN's, although
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each may be produced by a seperate manufacturer. For example, there may be
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a Motorola ESN of 123456, an Audiovox ESN of 123456, etc. With this in mind
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it is a possibility that a person could broadcast without changing the ESN,
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but rather changing the SCM and the SIDH.
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The ESN is a 32-bit number which uniquely identifies each unit. This
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ESN is factory programmed and installed and cannot be changed in the field
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without removing it and reprogramming a new chip. The ESN may or may not be
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related to the serial number stamped on the outside of the transceiver
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chassis. The ESN is encoded into messages which are interchanged with the
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cellular tower. The ESN must be provided when the phone is registered for
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service. The ESN is an 11-digit number. THE FIRST THREE NUMBERS ARE THE
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MANUFACTURERS DECIMAL CODE, THE NEXT TWO ARE RESERVED (BUT MAY CONTAIN ZEROS
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OR NUMBERS) AND THE REMAINING SIX ARE THE DECIMAL SERIAL NUMBER.
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*****************************************************************************
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