Verilink DCSU 2911 (880-502647-001) Product Manual - Manual (Page 38)

DCSU T1 Craft Interface
3-16 Verilink DCSU 2911 User Manual
end, the cyclic redundancy check is calculated again and
compared with the value generated by the transmit-side data.
Discrepancies indicate one or more transmission errors. This
counter is only available in ESF mode.
Choose Rn (where n is the number of the port) to reset the
counters. This command will return the values of the BPV, FE, ESF,
and CRC counters to zero or N/A.
Choosing X returns you to the Performance/Status Menu.
Performance Data When a P is entered from the Performance/Status Menu, the
following Performance/Status Menu 24 hour T1 Performance
Status Data Summary displays.
Figure 3-10 Performance/Status Menu (Data Summary)
When one of the following options from the Performance/Status
Menu (Data Summary) is selected, the previous 24-hour’s data is
displayed in 15-minute increments for a total of 96 blocks of time.
Press E
NTER to exit these screens.
Table 3-9
Performance/Status Parameters
-- DCSU 2911 PERFORMANCE/STATUS MENU --
24hr T1 Performance Data Summary
ES BES SES UAS LOF LOSS AISS
PORT 1 0 0 9932 87298 9931 9932 0
PORT 2 0 0 9968 87298 9968 0 0
PORT 3 0 0 0 0 0 0 0
PORT 4 0 0 0 0 0 0 0
En) Errored Seconds Un) Unavailable Seconds
Bn) Bursty Seconds Sn) Severely Errored Seconds
Ln) LOS Seconds Fn) SEF Seconds
Dn) LOF Seconds On) OOF Seconds
An) AIS Seconds Cn) Controlled Slip Seconds
Mn) Loss of Frame Counts Zn) AIS/SEF Seconds
Qn) Errored Seconds Type A Hn) Frame Errors
Jn) Degraded Minutes In) Error Free Seconds
Rn) Reset Registers X) exit this screen
[1,1] DCSU 2911 >
Command Description
En Errored Seconds (ES): A second with one or more CAS or FAS defects.
Un Unavailable Seconds (UAS): Counted for every second in which an Unavailable Signal State
occurs with the onset of 10 contiguous SES errors. It is also defined as the number of
seconds a service is unavailable due to a Loss of Frame (LOF) condition. The UAS condition
is stopped when the failure condition clears.
Bn Bursty Seconds (BES): A second having between 2 and 319 CRC-6 (Cyclical Redundancy
Check) error events.
Sn Severely Errored Seconds (SES): This error counts one-second intervals with an AIS or CRC
error.