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TERMINAL SERVERS
4.5.2 P
HYSICAL
C
HARACTERISTICS
—M
ODEM
-A
TTACHED
T
ERMINALS
The example in
Figure 4-12
shows how to define the physical characteristics
of the serial port with a modem connection to a terminal.
1 Local> DEFINE PORT 3 AUTOBAUD DISABLED SPEED 19200
2 Local> DEFINE PORT 3 CHARACTER 8 PARITY NONE STOP 1
3 Local> DEFINE PORT 3 FLOW CONTROL CTS
4 Local> DEFINE PORT 3 SIGNAL CHECK ENABLED
5 Local> DEFINE PORT 3 SIGNAL CONTROL ENABLED
Figure 4-12. Configuring a Port for a Modem-Attached Terminal.
Step 1: Define the Port Characteristics
In statement 1, a fixed speed of 19200 baud is defined and in 2, the port
is defined as 8-N-1.
Step 2: Define the Port Flow Control
In statement 3, the recommended flow control mechanism for modem-
attached terminals—CTS/RTS—is implemented.
NOTE
CTS/RTS is a flow control between the Terminal Server and the attached
modem. The modem itself must be configured to use the same flow
control mechanism.
Step 3: Define the Modem Control Options
Statements 4 and 5 define the ability of the Terminal Server to work with the
RS-232 (or RS-423) signal lines (DTR and DSR signals). This feature allows
the host to log out a session if the modem disconnects and also to force the
modem to disconnect if the host itself ends a session. Enabling Signal Check
on a specific port will cause the Terminal Server to wait for an active DSR
signal before starting any data reception and to log out the port if the DSR
signal is inactive.
Enabling Signal Control will configure the Terminal Server to activate
DTR during an active session and to deactivate it when the port is logged out.
Summary of Contents for LE2101A-BT-R2
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