D-Link DI-1750 Reference Manual page 49

3. Relation of circuit and interface
♦ Asynchronous interface and TTY circuit
♦ Synchronous interface and VTY circuit
Asynchronous interface and TTY Asynchronous interface correspond to physical terminal circuit [TTY].
Asynchronous interface can be connecting with terminal while protocol is not encapsulated.
Synchronous interface and VTY circuit: Virtual terminal circuit provides to access Router through the
synchronous interface. Corresponing of VTY circuit to synchronous interface is different from TTY.
circuit to asynchronous interface. The reason is VTY circuit is dynamic created in Router but TTY circuit
is static physical port. While a user connects to Router through VTY circuit, the user is connecting a
virtual port of interface. Every asynchronous interface has multiple virtual ports if it is permitted.
For example, several Telnet connect to a interface [Ethernet or serial interface].
4.3.2 enter the mode of line configuring
configure terminal parameter
Please see the section of"Example of VTY configuration" to understand the configuration of VTY.
1. Supervise and maintain VTY connection
Use the command show line to view VTY configuration.
♦ Example of VTY configuration
♦ Example of TTY configuration
Following confirguration is to set bandwidth of terminal output and screen ouput lines of terminal. The
user login at this port and the prompt more displayed per 40 lines. Line width limited in 132 characters,
or go to newline:
[DEFAULT@Router /config/]#line
Key Word:
U(undo)
(00)aux
(01)console
(02)tty
(03)vty
Please Input the code of command to be excute(0-3): 2
Key Word:
Q(quit)
(00)<1-64>
Please Input the code of command to be excute(0-0): 0
Please input a digital number:1 (input First Line number)
Key Word:
Q(quit)
(00)<2-64>
(01)<cr>
Please Input the code of command to be excute(0-1): 0
Please input a digital number:10 (input Last Line number)
Will you excute it? (Y/N):y
Key Word:
Q(quit)
......
(35)where
(36)width
port of Router (such as
Ethernet
interface).
D(default) Q(quit)
Auxiliary line
Primary terminal line
Terminal controller
Virtual terminal
First Line number
Last Line number
display all outgoing telnet connection
Set width of the display terminal
Model Name
and serial
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