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OS/2 Shareware BBS: 3 Comm
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1993-12-13
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TABLE OF CONTENTS
F. Appendix F - TalkThru TCP/IP Support
F. Appendix F - TalkThru TCP/IP Support
TCP/IP is a combination of two protocol standards designed to isolate the
application from the vagaries of various hardware platforms and
connectivity solutions. It essentially provides applications with common
interfaces to perform routine communications tasks. TalkThru For OS/2
supports a subset of this functionality.
Some of the various higher level interfaces supported by TCP/IP are mail,
data/file transfer, remote login, etc. Some of the lower level interfaces
are reliable stream
transport and connectionless packet delivery. However, TalkThru For OS/2
does not contain any TCP/IP logic, only the ability to interface to a
commercially available OS/2 workstation product - IBM's TCP/IP For OS/2.
The connection between TalkThru for OS/2 and IBM's TCP/IP For OS/2 is
achieved using a socket interface to process telnet traffic which is
essentially a service defined under the umbrella of remote login. The
telnet service takes blocks or streams of data and communicates these on a
peer to peer basis with a defined destination. TalkThru For OS/2 interacts
with this service as an asynchronous terminal where the blocks/streams
contain application data wrapped with a specific
terminal protocol.
The host that the TCP/IP Driver is communicating to might actually be
another OS/2 machine on a token ring network, using the same IBM TCP/IP
product but the application would be the Telnet Server portion of that
product. In this scenario, the TalkThru For OS/2 user could become a
remote user on the OS/2 host in character mode. In this case, the terminal
protocol that would be used is
simple TTY.
Alternatively, the host machine might be an HP3000 or a DEC VAX ethernet
bridged (8209) to a token ring network where the TalkThru For OS/2 user
would be emulating the appropriate terminal for that host environment.