12713140-003-2 Revision E.01 – January 2007
SSU-2000e Technical Reference
27
Chapter 2 TL1 Reference
TL1 Command and Response Conventions
Specify multiple aids using the ampersand (&)
Use a single ampersand (&) to indicate aid1 and aid2
Use a double ampersand (&&) to indicate a range from aid1 to aid2
The y or z part of the aid also uses the ampersand (&)
ctag
(Correlation Tag) field is a six-digit alpha-numeric message identifier code
that is received with the command and returned in the response, for correlation of
message and response within the operating system. The ctag
can be any
combination of six alpha-numeric characters randomly generated by the user.
gb
(General Block) is an field that is not used by the SSU-2000e but that you
must indicate by a double colon, that is, by preceding any parameters following
the ctag field with double colons (
::
).
other
is a field that is used for commands that require other information. The
format for this field is specified in the individual command descriptions.
In-Process Acknowledgment Response Message Conventions
Each command received by the SSU-2000e with a valid tid generates a response
when the terminating semicolon is received, followed by an output response
message or the output response.
The SSU-2000e sends the in-process acknowledgment (IP) only if it is unable to
respond to the command within two seconds. The requested response is then sent
in full when the SSU-2000e data is available.
The in-process acknowledgment response always begins with a carriage return and
two line feed characters, and ends with the header line containing the source
identifier (
sid)
, defined below, and the
date^time
stamp.
The format for the IP acknowledgment message is:
<cr lf lf>
^^^sid^date^time <cr lf>
IP^ctag <cr lf>
<
where:
sid
(Source Identifier)
is the returned ID, and is the same as the tid in the input
command message to which the IP acknowledgment is responding.
date
is the current year, month, and day in the SSU-2000e in the format:
YY-MM-DD.
time
is the current hours, minutes, and seconds timestamp information in the
SSU-2000e in the 24-hour format: HH:MM:SS.
IP
is the in-process response message that the SSU-2000e sends in response to
a command only if the SSU is unable to respond to the command within two
seconds. The SSU sends the requested response in full when the data is
available.