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6.3.2 Initial identification
The facsimile transmits its own capabilities to the destination by using the
initial identification. If optional signals are used, the indispensable DIS is
transmitted last.
Calling Side (transmitter)
Overview
The receiving side transmits NSF, CSI and DIS after transmitting CED.
NSF, CSI and DIS are repeatedly transmitted for a fixed period of time
until DCS is returned.
DIS
This signal communicates to the other party that the function is a stan-
dard function recommended by ITU-T. (mandatory)
Communicates the recording paper size, transmission speed, MTT, cod-
ing scheme, recording resolution, and other information.
NSF and CSI are option signals. They are described in 6.7 Option Signals
(described later).
G3 FACSIMILE COMMUNICATIONS
CED
Preamble
NSF
CSI
DIS
Preamble
NSF
CSI
DIS
Preamble
NSS
TSI
DCS
Fig. 5-67 Initial Identification
Transmission
Reception
1
2
Called Side (receiver)
3
4
5
6
ït
çi
Binary signal
5–93
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