Multi-Tech Systems MT5600SMI-L34 User Manual
Chapter 6 – Fax Class 1 and Class 1.0 Commands
Multi-Tech Systems, Inc. SocketModem MT5600SMI Developer’s Guide
99
Table 6-5. 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
<CSI frame data>
<DLE><ETX>
<DLE><ETX>
<DIS frame data>
<DLE><ETX>
<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
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
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
implied by answering
with +FCLASS=1.0.
not final frame
final frame
AT+FRH=3
CONNECT
<TSI frame data>
<DLE><ETX>
OK
<TSI frame data>
<DLE><ETX>
OK
detect carrier
detect flags
receive TSI
receive FCS
accept FCS
detect flags
receive TSI
receive FCS
accept FCS
send V.21 carrier
send flags
send TSI frame
send FCS
send flags
send TSI frame
send FCS
frame OK
AT+FRH=3
CONNECT
<DCS frame data>
<DLE><ETX>
OK
<DCS frame data>
<DLE><ETX>
OK
receive DCS
receive FCS
accept FCS
receive FCS
accept FCS
send DCS frame
send FCS
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
frame bit and issued
+FRH=3
AT+FTM=96
CONNECT
<TCF data>
<DLE><ETX>
OK
<TCF data>
<DLE><ETX>
OK
detect carrier
receive TCF
detect loss-of-carrier
receive TCF
detect loss-of-carrier
wait 75 ms
send V.29 carrier
send TCF data
drop carrier
send V.29 carrier
send TCF data
drop carrier
AT+FRH=3
<CFR frame data>
<DLE><ETX>
<DLE><ETX>
CONNECT
OK
send V.21 carrier
send flags
get CRF frame
send FCS
drop carrier
send flags
get CRF frame
send FCS
drop carrier
detect carrier
detect flags
receive CFR
detect flags
receive CFR
final frame
AT+FTM=96
CONNECT
<page image data>
<DLE><ETX>
NO CARRIER
<page image data>
<DLE><ETX>
NO CARRIER
detect carrier
receive page
detect loss-of-carrier
receive page
detect loss-of-carrier
send V.29 carrier
send page data
drop carrier
send page data
drop carrier
CONNECT
<EOP frame data>
<DLE><ETX>
NO CARRIER
<EOP frame data>
<DLE><ETX>
NO CARRIER
detect carrier
detect flags
receive EOP
receive FCS
accept FCS
detect flags
receive EOP
receive FCS
accept FCS
wait 75 ms
send V.21 carrier
send flags
send EOP frame
send FCS
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
<MCFame data>
<DLE><ETX>
<DLE><ETX>
CONNECT
OK
send V.21 carrier
send flags
get MCF frame
send FCS
accept FCS
send flags
get MCF frame
send FCS
accept FCS
detect carrier
detect flags
receive MCF frame
detect flags
receive MCF frame
final frame
AT+FRH=3
CONNECT
<DCN frame data>
<DLE><ETX>
OK
<DCN frame data>
<DLE><ETX>
OK
detect carrier
detect flags
receive DCN
receive FCS
accept FCS
detect flags
receive DCN
receive FCS
accept FCS
send V.21 carrier
send flags
send DCN frame
send FCS
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