Serial Port Specifications
Introduction
WaveLAN/EC-S User’s Guide
5-3
Passthrough2
5
The Passthrough2 protocol, like the Passthrough protocol, makes
no changes to the serial data stream as it is transmitted or
received. It is only available using the TCP/IP network protocol
1
.
It differs in the fact that it creates two independent network
connections for transmitted and received data, allowing
transmitted data to be sent to a different location than received
data originates from.
The standard Passthrough protocol is based a upon a single bi-
directional TCP/IP connection to a remote computer (or another
WaveLAN/EC-S). Since there is only one connection, data must
travel in both directions on it.
The Passthrough2 protocol allows you to set up a link that is based
on two separate connections; a send link and a receive link.
Telnet
5
Telnet is a protocol that uses the TCP/IP networking protocol.
Originally designed for UNIX-based operating systems, it allows a
person on one computer to connect to a remote computer to:
■
run applications, or
■
control a remote computer.
The WaveLAN/EC-S provides a “telnet prompt” much like that
used on UNIX systems. From this prompt, a user can open
connections to any computer that is connected to the same
1
The Passthrough2 protocol is not available for the RMP protocol because
RMP does not restrict the source and destination locations of data, like the
TCP/IP protocol.