Rockwell RC336D, Command Reference Manual

Page: 127 / 168

Command Reference Manual
1199 5-9
5.3.5 +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 5-4).
After a Page Transfer Status Report, the DCE reports the post page message from the remote facsimile station via the
+FET:<ppm> response (Table 5-3) 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.
5.3.5.1 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)