Longshine LCS-8056C2 - Manual (Page 131)

Commands for Host-Processed Modems Reference Manual
100498E Conexant 4-21
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 OK Set Class 1
RING<- detect ringing dials [,send CNG]
ATA
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
OK
detect carrier
detect flags
receive TSI
receive FCS
accept FCS send V.21 carrier
send flags
send TSI frame
send FCS
frame OK
AT+FRH=3
CONNECT
OK
receive DCS
receive FCS
accept FCS
send DCS frame
send FCS
final frame bit set
frame OK
AT+FRH=3 NO CARRIER detect loss-of-carrier drop carrier DTE did not check final
frame bit and issued
+FRH=3
AT+FTM=96
CONNECT
OK
detect carrier
receive TCF
detect loss-of-carrier wait 75 ms
send V.29 carrier
send TCF data
drop carrier
AT+FRH=3
CONNECT
OK send V.21 carrier
send flags
get CRF frame
send FCS
drop carrier detect carrier
detect flags
receive CFR
final frame
AT+FTM=96
CONNECT
NO CARRIER
detect carrier
receive page
detect loss-of-carrier
send V.29 carrier
send page data
drop carrier
CONNECT
NO CARRIER
detect carrier
detect flags
receive EOP
receive FCS
accept FCS wait 75 ms
send V.21 carrier
send flags
send EOP frame
send FCS
frame OK
AT+FRH=3 NO CARRIER detect loss-of-carrier drop carrier
AT+FRH=3
CONNECT
OK send V.21 carrier
send flags
get MCF frame
send FCS
accept FCS detect carrier
detect flags
receive MCF frame
final frame
AT+FRH=3
CONNECT
OK
detect carrier
detect flags
receive DCN
receive FCS
accept FCS send V.21 carrier
send flags
send DCN frame
send FCS
frame OK
AT+FRH=3 NO CARRIER detect loss-of-carrier drop carrier end of session
ATH0 OK hang up