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097-58001-01 Revision E – September 2006 TimeProvider TL1 Reference Guide 19

Chapter 1 TL1 Overview

Autonomous Messages

In-Process Response

If the TimeProvider cannot send a Normal response or an Error response within two

seconds of receipt of a command, it sends an In-Process response. The format of

an In-Process response is as follows. Note that IP identifies the response as an

In-Process response:

sid date time<cr><lf>

IP ctag<cr><lf>

When the TimeProvider finishes processing the original command, the In-Process

response is followed with either a Normal or Error response, as is appropriate. Table

1-4 provides a description of each field contained in the In-Process response.

Autonomous Messages

In addition to the TL1 responses described above, the TimeProvider might return

Autonomous Messages to report alarms, configuration changes, or condition

changes. Frequently, an Autonomous Message is returned at approximately the

same time as the TL1 response that is associated with a command, because the

command happens to cause a change in the unit’s state. Autonomous Messages

are not directly correlated with commands and they do not contain correlation tags

(ctags). They should, however, have an <atag>, which increments by one (from 1 to

999999) for each autonomous event.

Table 1-4. In-Process Response Fields

Field Description

sid The unit’s Source Identifier (SID), which identifies the specific TimeProvider unit

within the synchronization network. The unit’s SID is set using the SET-SID TL1

command.

date The date of the response, in the format YY-MM-DD, where YY is the 2-digit year, MM

is the 2-digit representation of the month, and DD is the day of the month.

time The time of the response, in the format HH:MM:SS, where HH is the hour in 24-hour

format, MM is the minutes, and SS is the seconds.

ctag The correlation tag that was sent as part of the TL1 command string. If the value for

the ctag is null in the command string, the unit returns a zero ( 0 ) as the ctag in the

response.

Note: By default, Autonomous Messages are displayed in the user’s

session. The display of Autonomous Messages can be enabled or

disabled using the ED-EQPT TL1 command with the AOMERGE

keyword.

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