Modem User Manual

Chapter 3 – Fax Class 2 Commands
Multi-Tech Systems, Inc. SocketModem MT5634SMIxx Reference Guide (S000263C) 49
AT Command Implementation
The best way to get an understanding of how Class 2.1 commands or responses are used is to
present an example of the transmission and reception of a one-page fax using Class 2.1.
Below are the commands and responses given to and returned from the transmitting and receiving
modems. Commands are shown in upper case, responses in lower case.
Transmitting Modem Receiving Modem
Line # Command/response Comments Line # Command/response Comments
T1 AT+FCLASS=2.1 Set class to originate as a fax
modem
R1 AT+FCLASS=2.1 Set class to
answer as a fax
modem. Tell the
modem the host
can receive
documents and
to auto-detect the
calling modem.
Required setting:
+FCLASS=2.1
T2 ok R2 ok
AT+FNR = 1,1,1,1 Enable all fax responses. AT+FNR = 1,1,1,1 Enable all fax
responses.
T3 AT+FLI=”666 6676" Set local fax ID R3 AT+FLI=”555 1212" Set local fax ID
T4 ok R4 ok
T5 ATDT5551212 Dial the receiving fax modem R5 ring
T6 +FCO Fax connection received
T7 +fci:”555 1212" Remote fax’s identification string
T8 +fis:0,5,0,2,0,0,0,0 Remote fax’s capabilities
T9 ok
T10 AT+FDT Begin negotiation and page
transmission
R7 +FCO Fax connection
received
R8 +fti:”666 6676" Remote fax’s
identification
string
R9 +fcs:0,5,0,2,0,0,0,0 Negotiated fax
parameters
(speed may
change)
R10 ok
R11 AT+FDR Begin page
reception
T11 +fcs:0,5,0,2,0,0,0,0 Negotiated fax parameters R13 +fcs:0,5,0,2,0,0,0,0 Final negotiated
fax parameters
T12 connect Ready for page data R14 connect Ready to receive
page data
T13 R15 <DC2>