Bay Networks 3395A, Configuration Manual

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ARAP Features
893-826-A 1-13
Figure 1-8 shows an example of an Xterminal connected to a communication
server.
Figure 1-8. An Xterminal connected to a Model 3395A server
The NCD Xterminal in Figure 1-8 that contains the Xremote Protocol stack in
PROMs, is connected to the communication server with a serial line. The
communication server runs the Xremote helper code. A user at this Xterminal
can gain access to different resources on the LAN, either directly or with a
modem. The Xterminal can establish the initial Xsession with various hosts on
the network that runs the XDM. The XDM host resides on the LAN, as does
another host that acts as a remote font server.
In this configuration, the Xremote Protocol runs across the serial line. The X
Windows Protocol runs on the LAN. The NCD helper code compresses X
Windows traffic from the LAN and sends it across the serial line. It also
decompresses Xremote traffic from the serial line and sends the X Windows
Protocol across the LAN.
ARAP Features
AppleTalk remote access (ARAP) allows a user to connect a remote Macintosh
computer to an AppleTalk network through a point-to-point modem link. A
remote access server transfers AppleTalk packets between a remote Macintosh
and an AppleTalk network so that the remote Macintosh acts as if it were
directly connected to the network.
Figure 1-9 and Figure 1-10 depict the differences between the standard remote
access configuration and an equivalent configuration using a Model 3395A
server. In the standard configuration (see
Figure 1-9 ), a Macintosh computer is
dedicated for use as a remote access server. The remote Macintosh computer
has access to all AppleTalk zones that are available to the Macintosh computer
5116
Serial line connection,
either direct or
with a modem
XMD Host
Xremote
Helper code
X Windows
NCD Xterminal
with Xremote PROMS
LAN
Remote
Font Server
Model 3000 Chassis with
Model 3395A
Server