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DIALING/COMMUNICATION CONTROL
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3
3) Example of protocol
The signals shaded in the following figure are the most important signals in the procedure.
- Late start
The receiver cannot detect CM signal while it is sending the ANSam signal. Therefore, it sends a
DIS signal to inform the availability of V.8 support. The transmitter sends a CI signal that causes
the receiver to send another ANSam signal which makes the receiver move to the V.8 procedure.
Transmitter Receiver
Line closed
(
DIS cannot
be recognized
)