TL1 Message Samples

Autonomous Messages
Messages

Autonomous messages, the most frequently used TL1 response type, are output messages sent by the NEs to report alarms, performance data, configuration changes, or condition changes. This means that alarms are sent immediately, instead of waiting until someone requests a status update. In this way, autnomous messages are the TL1 equivalent of the SNMP trap. In addition to receiving autnomous notification of alarms, TL1 operators can schedule messages that periodically report performance data values.

Severities
These codes are used to indicate an alarm severity or a response message.

Sample Autonomous Message #1 (Critical Alarm):

Sample Message 1

Sample Autonomous Message #2 (Alarm Clear):

Sample Message #2

As you can see, this message is almost identical to the original Autonomous Alarm Message, but with a slight difference: The code for Critical Alarm ("CR") has replaced by the code for Clear ("CL"). This indicates that the alarm condition described in the previous messsage has been cleared.

Command Messages
TL1 commands request an action to be executed by the recipient of the message

Sample Command #1 (Login to Network Element with "Activate" Command):

Command Message

In this example, the UID is a username, and the PID is a password. They will be compared against the receiving element's administrator list to determine the success of this login attempt. It's also important to remember that some NEs will send you no response at all until you have logged in successfully. This is a security measure to prevent malicious users from discovering that the NE is present at all. NOTE: Some TL1 NE's do not support any security, do not require a login, and do not support the "ACT-USER" command.

NOTE: The CANC-USER command is used to log off of a TL1 network element. Remember that some NE's will automatically log you off after a certain period of inactivity.

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