Toshiba e-STUDIO170F Service Manual page 381

[ 3 ] Frame structure of binary signals
Each binary signal frame is composed of the following sequences and fields. However, some binary
signals have an FIF field inserted, and others do not.
F F A
F: Flag Sequence
Indicates the start or end of a frame. It also establishes the frame synchronization.
A: Address Field
Informs of the address.
C: Control Field
Informs whether this frame is the final frame in this procedure or not.
FCF: Facsimile Control Field
Informs of the kind of binary signal.
FIF: Facsimile Information Field
Informs of the functions of the facsimile, etc.
FCS: Frame Check Sequence
Checks if there was any error in the transmission from "A" to "FIF."
• Formats of F, A, and C
b b
1 2
F 0 1
A 1 1
C 1 1
When this frame is the final frame, X=1.
January 2005 © TOSHIBA TEC
C FCF FIF
Format
b b b
3 4 5
1 1 1
1 1 1
0 0 X
9 - 9
FCS F
b b b
6 7 8
1 1 0
1 1 1
0 0 0
e-STUDIO170F Dialing and Communication Procedure
9