User guide

4-1

Terminal Interface 4

Each DL3800 is equipped with an integrated RS-232 ASCII user interface

that can be accessed through the COMM PORT (DE-9 connector) located on

the rear panel of the DL3800. Through this interface, the user can perform

various functions described in this section.

When operating in multidrop mode (multiple DL3800s may be daisy-

chained together for centralized network management), the user must log

in to establish communication with a single unit on the network. Only one

unit may be accessed at a time. All units continuously monitor the line,

but only the unit which is logged on will respond to terminal commands.

When no unit is logged on, the characters typed on the terminal will not

show up on the display screen.

To log on and log off a particular unit, follow these procedures:

1. Type Þve Ctrl-X commands in a row, followed by Enter (or

Return) to return a "roll call" of all Node Numbers on the chain.

This feature is useful when the Node Numbers of any units on the

network are unknown.

2. Type Ctrl-X followed by #, the node number, and press Enter

(or Return).

These characters will not be displayed on the terminal screen, but

the units will receive them.

If passwords are enabled for the unit, you will be prompted for

username and password. Initially, no password or username is

needed, so simply press Enter when prompted for a username or

password.

3. The Main Menu will appear. If not, check that the Node Number

matches what is typed on the terminal.

If it still does not appear, check that the DL3800 port settings match

the settings (baud rate, parity, data bits, and stop bits) of the

terminal. If so, a null modem adapter may be required to

interchange pins 2 and 3 (transmit and receive) from the terminal.