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Chapter 8, Programming The Call Processing Subsystem
CALL BIT Screen Message Field Descriptions
F4
OHD
Parity
574
Control filler message field 4. All bits must be set as indicated.
4 binary character required.
This field displays the overhead message type.
•
A '100' indicates a global action message.
•
A '110' indicates this is the first word of the system parameter overhead parameter
message.
•
A '111' indicates this is the second word of the system parameter overhead message.
3 binary character required.
Parity field. The contents of the Parity field cannot be set by the user. The Test Set
calculates the parity bits.
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