Telenetics 56 - Manual (Page 174)

AT Commands
Page 166
+FDR - Begin or Continue Phase C Receive Data
Syntax +FDR <CR>
Default value 3 seconds in some places
The +FDR command initiates transition to Phase C data reception. This can occur after
answering, dialing, a document is received, or a page is received.
The DCE reports the negotiated T.30 parameters, with the remote ID information if
available. When the DCE is ready to commence data transfer, it issues a CONNECT
response code. If the DCE cannot resume data transfer because there is no more data, it
responds OK. When the DTE is ready to accept data, it issues an <DC2> character (018)
to the DCE.
If the DTE issues an <XOFF> character to the DCE for flow control, the DCE signals the
DTE when its buffers are empty by sending a <DLE><DC2> (<016><018>) character
pair.
When the DCE delivers the last byte of a page, the DCE reports the Page Transfer Status
via the +FPTS:<ppr> response (Table A-25).
After a Page Transfer Status Report, the DCE reports the post page message from the
remote facsimile station via the +FET:<ppm> response (Table A-24) which signals the
intentions of the remote station.
The DCE holds the post page response message to the remote facsimile station (MCF,
etc.), represented in the +FPTS parameter until the next +FDR command. The DTE may
modify the +FPTS parameter before issuing the +FDR command which releases that
message. The DTE must issue a +FDR command to release Post Page Messages.
Initiate Document Reception
The +FDR command may be issued in Phase B after an answer command, or in Phase B
after a previous document.
The DCE response in stream mode is:
+FCFR when CFR sent
[+FTSI:<remote ID string>] if new TSI received
+FDCS:<T.30 subparameter string>] if new DCS
CONNECT
(<DC2> needed from DTE here)
<Phase C data stream>
<DLE><ETX>
+FPTS:<ppr>, <lc> [,<blc>, <cblc>]
+FET:<ppm>
OK
(DTE must issue +FDR command to release post page response)