Multitech Modem Module MT3334SMI, Руководство разработчика

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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