Method and apparatus for providing optional service functions in a private branch exchange
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United States of America Patent
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-
Dec 21, 1999
Grant Date -
N/A
app pub date -
May 16, 1997
filing date -
May 24, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A private branch exchange has optional service modules for providing optional service functions. The optional service modules are initially disabled, but can be enabled through a telecommunication link, in reply to owner information furnished by the private branch exchange. If the owner information is incorrect, the optional service modules can still be enabled, but the owner information stored in the private branch exchange is altered to leave evidence of the enabling operation. The enabling is carried out by remote authorization equipment according to an authorization key that specifies both the required optional service modules and the owner information. The authorization key is stored on a data medium that can be read only once.
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