Canon FAX L1000 Service Manual page 230

FAX-L1000 Chapter 3: Technical Reference
c) Examples of sequences
The signals in the shaded areas are important in the protocol.
c-1) Late start
Since the receiver cannot detect the CM signal while sending the ANSam signal, it sends
the DIS signal containing the "V.8 protocol" declaration. The transmitter sends the CI
signal to request the receiver to send the ANSam signal again to move to V.8 protocol.
TX
ANSam
NSF
CSI
(DIS cannot be detected.)
DIS
CNG
NSF
CSI
DIS
CI
ANSam
CM
JM
CJ
Figure 3-36 Late Start
3-86
RX
Connected to the line