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3166-A2-GB20-10
November 1998
Asynchronous Terminal Interface
Operation
H
Overview
You can configure and manage the 3166 DSU/CSU from an asynchronous
terminal that is configured for 9.6 kbps, 8 characters, no parity, and 1 stop bit.
This appendix provides operational examples to help you become familiar with
the use of the Asynchronous Terminal Interface (ATI) for DSU/CSU control.
Before Using the ATI
You can connect an asynchronous terminal directly to the COM port of the
DSU/CSU, or you can establish a remote connection using dial-in (via the integral
modem) or Telnet access.
Before using the ATI, you may use the SDCP to set certain configuration options
for ATI operation. Use the Configuration (Cnfig) branch of the SDCP menu and
edit the User Interface (User) configuration options for ATI operation. Refer to
Changing Configuration Options
in Chapter 3,
Operation
, and Appendix C,
Configuration Options
.
To connect the ATI to the DSU/CSU using Telnet access, refer to
Configuring the
DSU/CSU for SNMP or Telnet Access
in Chapter 3,
Operation
.
Resetting the ATI
If the DSU/CSU is misconfigured, leaving it in a state that does not support
asynchronous terminal operation, the recovery procedure consists of power
cycling the DSU/CSU, waiting for the completion of the power-up self-test, and
then pressing the asynchronous terminal’s Enter key five times in succession.
(Begin pressing the Enter key within two seconds after the completion of
power-up self-test, and do not wait longer than one second between each
successive key press.) This procedure allows you to use the System Paused
screen to reset the COM port configuration options or to reload all factory default
configuration options.