Telenetics 56 - Manual (Page 174)

AT Commands
Page 166
+FDR - Begin or Continue Phase C Receive Data
Syntax +FDR
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 character (018)
to the DCE.
If the DTE issues an character to the DCE for flow control, the DCE signals the
DTE when its buffers are empty by sending a (<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:] if new TSI received
+FDCS:] if new DCS
CONNECT
( needed from DTE here)
+FPTS:, [,, ]
+FET:
OK
(DTE must issue +FDR command to release post page response)