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Chapter 2 – Fax Class 1 and 1.0 Commands
Multi-Tech Systems, Inc. SocketModem MT5634SMIxx Reference Guide (S000263C) 47
DTE Commands Modem Responses Local Modem Action Remote Station Action Notes
AT+FRH=3 NO CARRIER detect loss-of-carrier drop carrier
AT+FRH=3
<MCFame data>
<DLE><ETX>
CONNECT
OK
send V.21 carrier
send flags
get MCF frame
send FCS
accept FCS
detect carrier
detect flags
receive MCF frame
final frame
AT+FRH=3
CONNECT
<DCN frame data>
<DLE><ETX>
OK
detect carrier
detect flags
receive DCN
receive FCS
accept FCS
send V.21 carrier
send flags
send DCN frame
send FCS
frame OK
AT+FRH=3 NO CARRIER detect loss-of-carrier drop carrier end of session
ATH0 OK hang up