User guide

4-10 Solo E1 DSU User Guide—June 1998
4
Carrier Registers, 24-Hour Detail
The data is organized and displayed in 96 15-minute intervals.
Performance data for the last 24 hours is displayed in the Carrier Registers,
24-hour detail menu as shown in the example in Figure 4-6.
Figure 4-6 Menu-3, Carrier Registers, 24-Hour Detail
Table 4-6 Carrier Registers, over 24 hours
Parameter Description
Errored Seconds (ES) A second with one or more frame errors or CRC-4 errors.
Unavailable Seconds (UAS) The number of seconds elapsed after 10 consecutive SES events are
received.
Severely Errored Seconds (SES) A second during which 300 or more CRC-4 violations or OOF events
have occurred.
Background Block Error (BBE) An errored block not occurring as part of an SES.
Total Valid Intervals Total number of valid intervals in the last 24 hours.