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Model 3395A Server Support for the Xremote Protocol
Establishing an Xremote Session
7-6
When users at ports 8-10 log in, the communication server software
automatically activates the Xremote process and searches for the XDM host at
the Internet address 129.70.110.83. If the communication server is successful,
an XDM login window appears on the screen.
When users at ports 11-16 log in, the Model 3395A server prompt appears on
the screen. These users must enter the XCONNECT command to establish an
Xremote session. Users can provide the domain name or Internet address of an
XDM host or simply enter the XCONNECT command to use the previously
defined host and query type.
The following command causes the communication server to search the
permanent database for an XDM host or the broadcast query type for this port.
In this example, the XDM host has been defined as 129.70.110.83.
TS3305> xconnect
The following command specifies an XDM host at the address 130.63.110.79.
TS3305> xconnect 130.63.110.79
When a communication server port requests an Xremote session, the
communi-cation server either sends XDMCP messages to the XDM host or
broadcasts XDMCP messages to the network if the query type is
BROADCAST. If a host agrees to manage the display, the Xterminal
automatically switches from ANSI emulation mode to Xterminal window
mode. (The serial-session window dis-appears at this point.) The XDM
establishes an initial master session, and the XDM login window appears after
a few seconds. This procedure uses two active communication server sessions.
When you log in at the XDM login window, the XDM runs the Xsession file,
which usually executes the .xsession file in your home directory. This usually
starts up additional windows and a window manager. You can also connect to
other XWindows hosts and open windows from those hosts.
An Xclient process on a host running XWindows connects to the NCD
Xserver on the NCD Xterminal through the communication server. This
connection accounts for one communication server session. Each
communication server session corresponds to one Xclient process, and
each window you open accounts for one Xclient process. The SHOW/
MONITOR SERVER XREMOTE display shows the total number of active
Xclients on the communication server. If you want to observe Xclients or active
communication server sessions on a specific port, use the SHOW/MONITOR
SESSIONS PORT x command.
If an XDM host refuses to manage the display, or the XDMCP request times
out, the Xterminal remains in ANSI emulation mode. If the query type is
SPECIFIC or you specified a host with the XCONNECT command, an error
message appears on the screen. If the query type is BROADCAST or
INDIRECT, the communication server searches for another XDMCP host. If it
does not find one after repeated attempts, an error message appears on the
display. The communication server remains in ANSI terminal emulation mode,
893-826-A
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