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send flags
send DNC frame
send FCS
drop carrier
detect carrier
detect flags
receive DC|NC
final frame
ATH0 OK hang up hang up
Table 4-5. Fax Class 1 Answering Sequence (Receiving a Single Page)
DTE Commands Modem Responses Local Modem Action Remote Station Action Notes
AT+FCLASS=1.0 OK Set Class 1
RING<- detect ringing dials [,send CNG]
ATA
<CSI frame data>
<DLE><ETX>
<DIS frame data>
<DLE><ETX>
CONNECT
CONNECT
OK
off-hook,
send CED,
send V.21 carrier
send flags
send CSI frame
send FCS
send flags
send DIS data
send FCS and flags
drop carrier
get CED,
detect carrier
detect flags
receive CSI
get FCS
get flags
get DIS
get flags
AT+FRH=3
implied by answering with
+FCLASS=1.0.
not final frame
final frame
AT+FRH=3
CONNECT
<TSI frame data>
<DLE><ETX>
OK
detect carrier
detect flags
receive TSI
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