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Chapter 8, Programming the Call Processing Subsystem
CALL BIT Screen Message Field Descriptions
OHD
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
Parity field. The contents of the Parity field cannot be set by the user. The Test Set
calculates the parity bits.