HP 8920A Programmer's Manual page 524

Chapter 8, Programming The Call Processing Subsystem
CALL BIT Screen Message Field Descriptions
OHD
Parity
C-FILMESS Message Fields
Figure 50 C-FILMESS Message Fields
T1T2
DCC
524
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.
This field identifies the received message as an order confirmation, an order, or a called
address message.
2 binary characters required.
Digital color code field.
2 binary characters required.