Multi-Tech Systems MT5634SMI V.92 ユーザーズマニュアル
Chapter 2 – Fax Class 1 and 1.0 Commands
Multi-Tech Systems, Inc. SocketModem MT5634SMIxx Reference Guide (S000263C)
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Examples
Examples of calling (transmitting) and answering (receiving) one page using Fax Class 1 commands are
shown in Table 3-4 and Table 3-5, respectively. The examples show the interchange between the DTE
and the modem for various cases. Comments are included to explain how to handle various situations.
Commands and responses are in upper case and comments are in lower case. All streams of data
denoted by <..frame> are terminated by the <DLE><ETX> characters.
Table 3-4. Fax Class 1 Calling Sequence (Transmitting a Single Page)
shown in Table 3-4 and Table 3-5, respectively. The examples show the interchange between the DTE
and the modem for various cases. Comments are included to explain how to handle various situations.
Commands and responses are in upper case and comments are in lower case. All streams of data
denoted by <..frame> are terminated by the <DLE><ETX> characters.
Table 3-4. Fax Class 1 Calling Sequence (Transmitting a Single Page)
DTE Commands
Modem Responses
Local Modem Action
Remote Station Action
Notes
AT+FCLASS=1
OK
Set Class 1
ATDT<string>
CONNECT
<NSF frame>
<DLE><ETX>
OK
Dial and send CNG
Look for V.21
Detect flags
Look for V.21
Detect flags
Answer
send CED, V.21
Send HDLC flags
send CED, V.21
Send HDLC flags
Send NSF frame
AT+FRH=3
implied by dialing with
+FCLASS=1.0
implied by dialing with
+FCLASS=1.0
AT+FRH=3
CONNECT
<CFI frame data>
<DLE><ETX>
OK
Detect flags
get CSI
get FCS
accept FCS
send CSI frame
check FCS
Frame status OK
AT+FRH=3
CONNECT
<DIS frame data>
<DLE><ETX>
OK
Detect flags
get DIS
get FCS
accept FCS
send DIS frame
check FCS
DTE must detect final
frame bit to anticipate
loss of carrier
AT+FRH=3
NO CARRIER
detect loss-of-carrier
drop carrier
AT+FRH=3
<TSI frame data>
<DLE><ETX>
<DCS frame data>
<DLE><ETX>
<TSI frame data>
<DLE><ETX>
<DCS frame data>
<DLE><ETX>
CONNECT
CONNECT
OK
send V.21 carrier
send flags
send TSI frame
send FCS
send flags
send DCS frame
send FCS, flags
drop carrier
send flags
send TSI frame
send FCS
send flags
send DCS frame
send FCS, flags
drop carrier
detect carrier
detect flags
get TSI frame
get DCS frame
detect flags
get TSI frame
get DCS frame
Final frame bit clear tells
the modem to expect
another frame.
Final frame bit set tells
the modem not to
expect another frame
the modem to expect
another frame.
Final frame bit set tells
the modem not to
expect another frame
AT+FTS=8;
+FTM=96
<TCF data pattern>
<DLE><ETX>
+FTM=96
<TCF data pattern>
<DLE><ETX>
CONNECT
OK
wait 80 ms
send V.29 carrier
send TCF data
drop carrier
send V.29 carrier
send TCF data
drop carrier
detect carrier
get TCF data
AT+FRH=3
CONNECT
<CFR frame data>
<DLE><ETX>
OK
detect carrier
detect flags
get CFR frame
check FCS
accept FCS
detect flags
get CFR frame
check FCS
accept FCS
send V.21 carrier
send flags
get CRF frame
send FCS
send flags
get CRF frame
send FCS
Final frame bit set.
frame OK
AT+FRH=3
NO CARRIER
detect loss-of-carrier
drop carrier
AT+FTM=96
<page image data>
<DLE><ETX>
<page image data>
<DLE><ETX>
CONNECT
OK
OK
send V.29 carrier
send page data
drop carrier
send page data
drop carrier
detect carrier
receive page
receive page
AT+FTS=8;
+FRH=3
<EOP frame data>
<DLE><ETX>
+FRH=3
<EOP frame data>
<DLE><ETX>
CONNECT
OK
wait 80 ms
send V.21 carrier
send flags
send EOP frame
send FCS
drop carrier
send V.21 carrier
send flags
send EOP frame
send FCS
drop carrier
detect carrier
detect flags
receives EOP
final frame
AT+FRH=3
CONNECT
<MCF frame data>
<DLE><ETX>
OK
detect carrier
detect flags
get MCF frame
check FCS
accept FCS
detect flags
get MCF frame
check FCS
accept FCS
send V.21 carrier
send flags
get MCF frame
send FCS
send flags
get MCF frame
send FCS
Final frame bit set.
frame OK