HP 8920B - Reading A Call Processing Subsystem HP-IB Error Messages

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Chapter 8, Programming The Call Processing Subsystem
Using the Call Processing Subsystem’s Remote User Interface
Reading A Call Processing Subsystem HP-IB Error Messages
If an error occurs while in the Call Processing Subsystem, an appropriate error
message will be placed in the Error Message Queue. The control program can
read the Error Message Queue to retrieve the error message. See "Error Message
Queue Group," in chapter 5, on page 284
for detailed information on the Error
Message Queue.
If an error occurred while attempting to decode data messages received from the
mobile station on the reverse control channel or reverse voice channel, the raw
data message bits are displayed in hexadecimal format in the upper right hand
portion of the
CALL CONTROL screen.
Figure 33 on page 469 shows the layout of the CALL CONTROL screen when a
decoding error has occurred. The raw data bits can be read by the control program.
Refer to the Display field description, on page 483, for information on how to
read data in the upper right hand portion of the CALL CONTROL screen.
Figure 33 CALL CONTROL Screen with Decoding Error Message Display