Pulse or digital communications – Repeaters – Testing
Patent
1991-10-15
1993-12-07
Kuntz, Curtis
Pulse or digital communications
Repeaters
Testing
379 39, H04L 516, H04B 138
Patent
active
052689280
ABSTRACT:
A data modem is provided with a boot ROM having a set of instructions for a programmable processor to perform its basic functions within the modem. Enhancements and firmware updates are downloaded over a telephone line through the modem's inherent communications abilities and stored in a battery backed RAM. This permits firmware updates and enhancements to be implemented remotely without need for replacement of ROM or opening of the modem housing.
REFERENCES:
patent: 3842405 (1974-10-01), Key et al.
patent: 4841561 (1989-06-01), Hill
patent: 4918623 (1990-04-01), Lockitt et al.
patent: 4956852 (1990-09-01), Hodge
patent: 5070500 (1991-12-01), Horinouchi et al.
patent: 5131025 (1992-07-01), Hamasaki
Communications Week, "Modem Moves", by Judith Levine, dated Jun. 3, 1991.
Herh Ting
Hidalgo Adolfo J.
She Lungshan
Kuntz Curtis
Miller Jerry A.
Newton William A.
Racal-Datacom, Inc.
Webster Bryan E.
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