Telenetics 56 - Manual (Page 166)

AT Commands
Page 158
DCE to DTE Streams
The DTE must filter the data stream from the DCE, and remove all character pairs
beginning with <DLE>. The DTE must recognize <DLE><ETX> as the stream
terminator. The DTE must recognize <DLE><DLE> and reinsert a single <DLE> in its
place.
The DCE filters stream data to the DTE, and inserts extra <DLE> characters ahead of
data.
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. These
parameters are defined in Table A-23.
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 parameters +FDIS: <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