Specifications

4 Message Reference
110
Typically, a managing application would be set up to periodically (for example, hourly
or daily) read and reset the statistics and store the resulting information so that it can
be accessed later for generation of performance reports for the line interface.
This message is now version 2; it contains Pseudo Random Bit Sequence (PRBS)
statistics. The old message (version 1) continues to be supported by the software.
Parameters
The LIU_MSG_R_STATE message includes the following parameters:
version
Used to indicate the version of the parameter area that the managing application is
expecting in the confirmation message. The version field should be set to 2 for this
message. Version 1 of the message is supported for backwards compatibility.
duration
The duration (in seconds) since the statistics were last reset.
bit_errors
A count of the actual number of bit errors detected by the framer device for the LIU.
The precise meaning of this parameter varies depending on the operating mode of the
framer.
— For E1 operating modes, it is the number of errors detected in the frame
alignment word.
— For T1 interfaces operating in D3/D4 frame format, it is the number of
framing bit errors.
— For T1 interfaces operating in ESF format, it is the number of CRC6
errors.
Note: In general, the user should use the errored_seconds and severely_errored_seconds
parameters instead since these parameters provide normalized values that have the same
meaning for all modes of operation.
code_violations
A count of all the line code violations detected on the interface.
frame_slips
A count of the number of frame slips that have occurred on the interface.
oos_transitions
A count of the number of transitions from the in synchronization state to the out of
synchronization state.
errored_seconds
The number of seconds since the statistics were last reset during which the interface
contained errors. An errored second is any second during which the interface is out of
synchronization, or there are frame slips, bit errors or line code violations.
severely_errored_seconds
The number of severely errored seconds since the statistics were last reset. A severely
errored second is a second during which the interface is out of synchronization or the
bit error rate exceeds 1 in 1,000.