Tl1 Command And Response Conventions - Symmetricom SSU-2000 User Manual

The communications mode settings for the COMM L (local) port (located on the
Communications module) always default to ASCII mode on startup.
When connecting via Ethernet, a telnet session to port 2000 (decimal) opens in
TL1 mode and remains until the session is terminated. Once connected in TL1
mode, you must log in using the ACT-USER command with a user name and
password (if security is active on the unit).
To close the serial port for TL1 communications, type
send three ESCape characters from the management terminal. This logs you out
and returns the port to the default communications mode.
To log off the user and exit from an Ethernet connection:
Type
EXIT
Type
CANC-USER
setting to security level 0. This command does not change the communications
mode.
Note: The automatic time-out is disabled for the port when you
are communicating in TL1 mode using one of the serial
communications ports or the Ethernet port.

TL1 Command and Response Conventions

This section describes general and specific conventions for expressing TL1
command and response parameters for the four types of operations application
messages:
Input Command Message – This message determines the action that the
SSU-2000 will take. For a detailed description of input command messages and
conventions, see
In-Process Acknowledgment – The in-process acknowledgment (IP) response
message is sent in response to a command that the SSU-2000 is unable to
respond to within two seconds. For a detailed description of in-process
acknowledgment response messages and conventions, see
Acknowledgment Response Message
Output response message – The output response message indicates whether
the command was complied with (COMPLD) or denied (DENY). For a detailed
description of output response messages and conventions, see
Response Message
Autonomous response or report message – The autonomous response or
report message is an output generated by the SSU-200 due to an event, such as
an alarm, or a change in status in the system. For a detailed description of
autonomous response or report messages and conventions, see
Report Conventions, on page 272.
12713020-002-2 Revision D – April 2004
, then press Enter, or disconnect the Telnet session or.
, then press Enter to log out and return the port communication
Input Command Message
Conventions, on page 270.
, then press Enter, or
EXIT
Conventions, on page 268.
Conventions, on page 269.
TL1 Command Interface
In-Process
Output
Autonomous
SSU-2000 User's Guide 267