Multiple user SIM card secured subscriber unit

Details Multiple user SIM card secured subscriber unit Multiple user SIM card secured subscriber unit

1997-12-16

2000-09-12

Bost, Dwayne D.

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

455410, 455411, H04B 138, H04M 100, H04M 166, H04M 316

Patent

active

061190209

ABSTRACT:
A subscriber unit (101) includes a SIM card reader (107) for receiving a SIM card (105). The subscriber unit (101) is serialized and has stored therein an alphanumeric signature value which is associated with the specific serialized subscriber unit (101). The subscriber unit (101) is fully operable only with a SIM card (105) having stored therein the specific signature value corresponding to the serialized subscriber unit (101). A user having a SIM card (105) containing the specific signature value for that subscriber unit can select a mode of user operation which will permit multiple selected SIM card holding users to use the subscriber unit.

REFERENCES:
patent: 4868846 (1989-09-01), Kemppi
patent: 5404580 (1995-04-01), Simpson et al.
patent: 5418837 (1995-05-01), Johansson et al.
patent: 5444764 (1995-08-01), Galecki
patent: 5497411 (1996-03-01), Pellerin
patent: 5687216 (1997-11-01), Svensson
patent: 5875404 (1999-02-01), Messiet
patent: 5884168 (1999-03-01), Kolev et al.
patent: 5907804 (1999-05-01), Schroderus et al.
patent: 5913175 (1999-06-01), Pinault

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