Multi-Tech Systems Modem Module MT3334SMI User Manual
Page 39
Chapter 3 - Class 1 Fax Commands
MT3334SMI
39
Table 3-3. Single-Page Class 1 Answer & Receive Example
Action by
Action by
Command
Respone
Local Modem
Remote PC
AT+FCLASS=1
OK
Set Class to 1
RING
Detect Ringing
Dial, send CNG
ATA
Off hook,
Send CED,
Get CED
Send V.21 carrier
Detect carrier
CONNECT
Send flags
Detect flags
<CSIframe data>
Send CSI data
Receive FCS
<DLE><ETX>
Send FCS
CONNECT
Send flags
<DISframe data>
Send DIS data
Receive DIS
<DLE><ETX>
Send FCS and flags
OK
Drop carrier
AT+FRH=3
Detect carrier
Sends V.21 carrier
CONNECT
Detect flags
Send flags
<TSI frame data>
Receive TSI
Send TSI frame
<DLE><ETX>
Receive FCS
Send FCS
OK
Accept FCS
AT+FRH=3
CONNECT
<DCS packet data>
Receive DCS
Send DCS frame
<DLER><ETX>
Receive FCS
Send FCS
OK
Accept FCS
AT+FRH=3
NO CARRIER
Detect loss of
Drop carrier
carrier
AT+FRM=96
Wait 75 msec.
CONNECT
Detect carrier
Send V.29 carrier
<TCF data>
Receive TCF
Send TCF data
<DLE><ETX>
Detect carrier loss
Drop carrier
NO CARRIER
AT+FTH=3
Send V.21 carrier
Detects carrier
CONNECT
Send flags
Detects flags
<CFRframe data>
Send CFR frame
Receives CFR
<DLE><ETX>
Send FCS
OK
Drop carrier
AT+FRM=96
CONNECT
Detect carrier
Send V.29 carrier
<page image data>
Receive page
Send page data
<DLE><ETX>
Detect carrier loss
Drop carrier
AT+FRH=3
Wait 75 msec.
Detects carrier
Sends V.21 carrier
CONNECT
Detects flag
Sends flag
<EOP frame data>
Receives EOP
Sends EOP packet
<DLE><ETX>
Receives FCS
Send CRC
OK
Accepts FTS
AT+FRH=3
NO CARRIER
Detects loss of
Drops carrier
carrier
AT+FTH=3
Send V.21 carrier
Detect carrier
CONNECT
Send flags
Detect flags
<MCF frame data>
Send MCF frame
Receive MCF frame
<DLE><ETX>
Send FCS
OK
Drop carrier
AT+FRH=3
Receives carrier
Send V.21 carrier
CONNECT
Detects flags
Send flags
<DCN frame data>
Receives DCN
Send DCN frame
<DLE><ETX>
Receives FCS
Send FCS
OK
Accepts FCS
AT+FRH=3
NO CARRIER
Detect loss of
Drops carrier
carrier
ATH0
OK
Hangs up