SCS PTC-IIex, Manual

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1 Introduction
6
interfaces. The PTC appears to an attached PC as if it were a Hayes compatible "telephone
modem”. The PTC locally takes over both the complete PPP and TCP/IP handling. Except for
a minimum fraction of protocol overhead, the physical PACTOR link only carries useful data.
The huge amount of overhead of the TCP/IP and PPP protocols (which are designed for broad
banded wired links) is reduced to the absolute minimum required. By locally carrying out the
PPP protocol between the PC and the PTC a further decisive advantage arises: Because of the
very short timeouts, PPP used to be nearly impossible over slow communication channels with
relatively large delays. Timeout problems are now solved by the PACTOR-IP-Bridge.
Summarizing the qualities of the PIB:
•
TCP/IP-transparent and relatively fast Internet access via HF-radio.
•
Internet-services accessible via PACTOR, e.g. E-Mail (SMTP/POP3), FTP, HTTP, ...
•
Up to 4 Internet channels ("sockets") over one physical PACTOR link.
•
Extreme compression of the TCP/IP and PPP"overhead".
•
Full PPP compatibility: Use of common client/server-software, like Netscape, Outlook,
Eudora and others is possible.
•
Easy embedding and configuration under all common operating systems.
•
No "timeout"-problems on PPP and TCP/IP.
As host system for the PACTOR-IP-Bridge
SCS
has developed the PTC-IInet.
A detailed manual for the Professional Firmware can be found on our homepage
http://www.scs-ptc.com .
1.6.3 EasyTransfer
EasyTransfer is a program developed for binary transparent file-transfers between two
computers connected via PACTOR. The graphical user interface is similar to some well known
FTP clients, which are used for file –transfers via the Internet. When viewing the software user
interface, the left side shows the contents of the local hard disk, on the right are the contents of
the enabled REMOTE directory of the PACTOR connected server. Files can easily be moved
between the two sides using standard drag-and-drop actions. In addition to FTP, EasyTransfer
has a “chat” mode to exchange hand typed messages. With that, EasyTransfer is the ideal tool
to exchange computer data via HF and over unlimited distances.