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Chapter 8, Programming The Call Processing Subsystem
Description of the Call Processing Subsystem's Remote User Interface
Description of the Call Processing Subsystem's Remote User Interface
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The Call Processing Subsystem's Remote User Interface consists of the following
items:
•
a set of programming commands which access all available fields on the six Call Pro-
cessing Subsystem screens
•
a status register group whose condition register reflects the current state of the Call Pro-
cessing Subsystem annunciator state indicators
•
a set of error messages, available through HP-IB, which provide information about er-
ror conditions encountered while in the Call Processing Subsystem
The programming commands provide the capability to generate control programs which
can establish a cellular link between the Test Set and a cellular phone (mobile station).
The status register group and the error messages provide the control program with the
information necessary to make program flow decisions.
Once a link is established the control program can exercise the call processing
functionality of the mobile station, such as:
•
the decoding of orders from the Base Station, such as; orders to retune the transceiver
to a new frequency, to alert the mobile station user to an incoming call, to adjust the
transceiver output power level, or to release the mobile station upon completion of a
call.
•
the encoding of signaling information for transmission to the base station, such as; di-
aled digits for call origination, disconnect signal at the completion of a call, or mobile
identification number.
the authentication signaling associated with AMPS (IS-54) call processing such as shared
secret data update, unique challenge, origination with authentication and page with
authentication.
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