
Using File Transfer Programs
3-18
Falcon
®
DOS Portable Terminals
E#
Maximum Number of Errors Before Aborting Transfer:
The
E
option is
used to specify the maximum number of times the receiver will request a
retransmission of a packet before aborting the transfer session.
The default is
0
, meaning the transfer will never be aborted because of errors. If
the
E
option is used without specifying a number, an error will occur.
F#
Flow Control:
This option is used to specify what type of flow control to use
for the file transfer.
Flow control is the ability of the receiver to detect that data is coming in faster
than it can receive and to issue a command to the sender instructing it to stop
sending data. When the receiver is again able to handle new data, it issues
another command instructing the sender to resume the transfer of data.
XFER supports two types of flow control: software (XON/XOFF) and
hardware (RTS/CTS). Only one type can be used at a time. The sender and
receiver should have this option enabled similarly.
To use the
F
option, replace the
#
symbol with the desired setting:
0
- No flow control
1
- XON/ XOFF
(Zmodem only)
2
- RTS/ CTS
If the
F
option is used without specifying a number, it is assumed to mean
F0
,
or no flow control. This is useful in the case where flow control is specified in
the
XFER_ARGS
environment variable (refer to
) but flow control is
turned off for the current transfer session. An invalid setting will result in an
error on the command line.
Flow control defaults and capabilities differ depending upon the protocol
(Xmodem or Zmodem) being used.
For multiple file transfers in Zmodem, the entire session is aborted, not just the
transfer of the current file.
The RTS/CTS flow control option is only available when using XFER with the Falcon
31x and 32x.
advuser.book Page 18 Friday, September 27, 2002 4:22 PM
Содержание DOS Portable Data Terminals
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