Chapter 3 – Fax Class 2 Commands
Multi-Tech Systems, Inc. SocketModem MT5600SMI/MT5656SMI Reference Guide (S000306C)
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Auto Answer
The DCE can answer as a data DCE or as a fax DCE. It can answer the call adaptively, i.e., it can
determine whether the call is 'data' or 'fax'. The +FAA parameter controls this feature. Fax adaptive
answer operates only when +FCLASS=0.
AT+FAA=1
; Auto answer as a facsimile or a data modem depending on the call
CONNECT XXXX ; DCE status response if data call
+FCON ; DCE status response if fax call
Identification of T.30 Options
Group 3 devices negotiate session parameters in DIS, DCS, and DTC frames.
Session Status Reporting
The DCE provides reports to the DTE on the status of a session. The DCE provides the following status
reports:
1.
Connection and hang up status:
+FCON
+FHNG:<0-255>
2.
Requested DIS session paraFDIS: <string> reports remote facsimile
capabilities.
Syntax: +FDIS: VR, BR, WD, LN, DF, EC, BF, ST
3.
+FDCS: <string> reports the negotiated parameters
4.
Phase C prompts:
XON, XOFF, DC2
5.
Phase C base status reports: depending upon copy quality and related end-of page
status:
+FPTS:
<1-5>
Procedure Interrupt Negotiation
CCITT allows a station to request a procedure interruption at the end of a page. This request is passed
between stations by the PIP, PIN, and PRI-Q messages.
