| 摘要 |
A module (P-code module) provides parameter information to a Number Assignment Module (NAM) in a cellular phone unit by processing a simple programming code (P-code) entered by the user through a telephone keypad. The P-code employs a flexible length telephone keypad coding that can be translated into programmable parameters of cellular phone products. Field identification numbers and look-up tables are used to shorten the P-code length for more frequently used information. To activate a cellular phone, the user provides product and serial number information to a dial- up access center which then generates a scrambled P-code for entry by the user. The P-code module within the processor unit of the cellular phone likewise descrambles, decompresses, and performs an integrity check on the sequence of digits being entered by the user. This P-code module reduces the technical requirements for programming a cellular phone purchased at the retail level such that a user can perform the necessary programming for activating the cellular telephone on a local telephone network. A security arrangement randomly generates two passwords when the cellular telephone is activated to prevent unauthorized reprogramming of the phones for use on other cellular telephone networks.
|
