Multi-Tech Systems Modem Module MT3334SMI - 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
Send CSI data Receive FCS
Send FCS
CONNECT Send flags
Send DIS data Receive DIS
Send FCS and flags
OK Drop carrier
AT+FRH=3 Detect carrier Sends V.21 carrier
CONNECT Detect flags Send flags
Receive TSI Send TSI frame
Receive FCS Send FCS
OK Accept FCS
AT+FRH=3 CONNECT
Receive DCS Send DCS frame
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
Receive TCF Send TCF data
Detect carrier loss Drop carrier
NO CARRIER
AT+FTH=3 Send V.21 carrier Detects carrier
CONNECT Send flags Detects flags
Send CFR frame Receives CFR
Send FCS
OK Drop carrier
AT+FRM=96
CONNECT Detect carrier Send V.29 carrier
Receive page Send page data
Detect carrier loss Drop carrier
AT+FRH=3 Wait 75 msec.
Detects carrier Sends V.21 carrier
CONNECT Detects flag Sends flag
Receives EOP Sends EOP packet
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
Send MCF frame Receive MCF frame
Send FCS
OK Drop carrier
AT+FRH=3 Receives carrier Send V.21 carrier
CONNECT Detects flags Send flags
Receives DCN Send DCN frame
Receives FCS Send FCS
OK Accepts FCS
AT+FRH=3 NO CARRIER Detect loss of Drops carrier
carrier
ATH0 OK Hangs up