Message structure and expected tokens

TL1 messages consist of the following parts: header, identifier, text block, and terminator. Each part has a set of tokens that convey details about the network element and the event being reported.

This section describes the structure of a TL1 message in relation to the expected tokens for each part. The tokens themselves are shown in parentheses in the descriptions that follow.

Header

The header format is the same for both autonomous and output response messages. It contains a terminal identifier (TID), and the date and time that the event occurred.

Identifier

The identifier contains information relevant to the nature of the message. In an autonomous message, this contains an autoid, which identifies the severity of the message. In an output response message, this contains a correlation tag (CTAG), which corresponds to the input command, and a completion code (CompCode).

Text block

The text block is an optional component and contains information that is specific to the message.

Terminator

The terminator indicates the end of the message.

The following example shows a TL1 autonomous message: 

<cr> <lf> <lf>
^^^BOCALFMA010^03-06-02^01:10:20 <cr> <lf>
*^^456.123^REPT^ALM^T1 <cr> <lf> 
^^^”T1AID-16:MN,CGA,NSA” <cr> <lf>
^^^”T1AID-32:<cr> <lf> MN,CGA,NSA” <cr> <lf>
;

Where:

  • ^^^ are spaces
  • BOCALFMA010 is the AID
  • 03-06-02 is the date
  • 01:10:20 is the time
  • 456.123 is the Atag (Autonomous Correlation Tag)
  • REPT is the verb
  • ALM is an additional modifier to the verb
  • T1 is an additional modifier to the verb
  • ”T1AID-16:MN,CGA,NSA” <cr> <lf> is a quoted line