Dataplex DPX-213, User Manual

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DATA TRANSFER
Section 8
6-6
Copyright (C) Dataplex Pty Ltd
The ZMODEM or Ymodem-G protocol is ideal for all types of file transfer over an error
protected channel. ZMODEM is a "sliding window" protocol that allows for long path
delays such as through multiplexer channels, packet switched networks or ARQ modems.
ZMODEM searches for control characters such as Xon and Xoff which may be embedded
in the file. Such characters are converted to an escape sequence which will not confuse the
MNP flow control. ZMODEM with either RTS/CTS or Xon/Xoff flow control allows
*.EXE, *.BIN, *.COM and all other files to be sent over the DPX-213 while retaining the
benefits of error correction. ZMODEM is error protected so there is a small additional
overhead, but it is a very efficient protocol compared to XMODEM.
6.8 Software Compatibility
The DPX-213 modem operation is compatible with most popular communication programs
that use the AT dialling protocol. When the modem is using MNP, there are some software
restrictions described above which must be understood. Zmodem or Ymodem-G is
recommended for file transfers whenever MNP or V42 is active. The use of small block,
half duplex protocols such as Xmodem will slow down file transfers considerably and not
take full advantage of the in built error control.
The DPX-213 modem is compatible with all communications programs that use the 'AT'
dialling protocol. Listed below is an incomplete list of the software tested with the DPX-
213. Consult Dataplex for more specific details.
•
Smartcom Version 2.1;
•
Magicsoft MTEZ;
•
Crosstalk XVI Version 3.6;
•
Procomm Version 3.2;
•
Supercomm Version 2 & 3;
•
PCTalk;
•
Telix (Versions 2 & 3);
•
Dataplex FleetCom, and,
•
Mirror II.