Backwards compatible, extended method to execute check...

Details Backwards compatible, extended method to execute check... Backwards compatible, extended method to execute check...

2006-05-30

2006-05-30

Tran, Pablo N. (Department: 2685)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S414400, C455S432200, C455S401000

Reexamination Certificate

active

07054657

ABSTRACT:
A method is taught to provide an improved mobile station International Mobile Equipment Identity (IMEI) code having at least a six digit hexadecimal SNR representation, in conjunction with modifying a Check Digit calculation procedure so as to insure backwards compatibility with an existing installed base of mobile stations having a six digit BCD SNR representation.

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Jane Thacker, Effect of Adopting a Hexadecimal Format for the ISAN on the Method of Calculating the Check Digit, Aug. 6, 1999, ISO/TC 46/SC 9/WG 1, pp. 1-4.
ANSI American National Standards Institute, “American National Standard for Identification Cards-Identification of Issuers-Part 1: Numbering System”, (ANSI/ISO/IEC 7812-1993), 1993.

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