Exchange/SNA Manual

Step 3: Establish the Connection
Using the Exchange/SNA Command Interpreter
104700 Tandem Computers Incorporated 2–7
CONNECT With an Exclamation Point (CONNECT !). This form of the CONNECT command
does not require that the current configuration parameters match the configuration of
the specified line server. Only the name must match; that is, you must specify the
name of the line server in the NAME parameter of the SET command (or the RJECIS
command that started the command interpreter). Provided you have specified the
name of an existing line server, a subsequent CONNECT ! command (with an
exclamation point) establishes a connection with the line server regardless of the
values of the current configuration parameters. This form of the CONNECT command
does not require you to know the configuration of the line server before you can
establish a connection with that line server.
The configuration of the line server does not change if the current configuration
parameters are different from the configuration of the line server. After a line server
has been started, the configuration of that line server cannot be changed.
Step 3: Establish the
Connection
Before you can communicate with the host system, you must establish a connection
with an Exchange/SNA line server by using the CONNECT command. Step 2 above
describes the configuration parameters that you must specify. The following
subsections discuss the other considerations.
Starting a New Line Server
When you use the CONNECT command to start a new line server, the new line server
supports the configuration specified by the current values of the configuration
parameters.
The new line server establishes communication with the host system and establishes
sessions between its logical units (LUs) and host LUs. The line server can use all
available LUs up to a maximum of six. You use the Subsystem Control Facility (SCF)
to define the LUs for a SNAX/XF data communications line and to define the APPL
objects for a SNAX/CDF data communications line. Note that all LUs used by
Exchange/SNA must also be defined in the host system. For more information, see
the SNAX/XF Configuration and Control Manual or the SNAX/CDF Configuration and
Control Manual. For more information on how to define Exchange/SNA and its LUs
for the host system, see the documentation supplied with the host system.
Note If you have been using the Communications Management Interface (CMI), you will probably have to
modify your existing command files to be compatible with SCF. The SCF command language is similar to
that of CMI, but it is different; examine your command files closely.
After the sessions have been established, the line server sends the command contained
in the file specified in the LOGON configuration parameter to the host RJE subsystem.
This command performs the logon procedure required by the host system. After the
logon procedure has completed successfully, the line server is ready for use.