Nortel Networks 553-3001-211 manual Performance counters and reporting, Display Status D S screen

Page 292 of 894 NT5D33 and NT5D34 Lineside E1 Interface cards

Figure 51

Display Status (D S) screen

LEI	S/N			Software Version 1.01				3/03/95	1:50
In alarm state:					NO
E1 link			at	alarm	level	0
Port	0	off		hook,	Port 1 on hook, Port 2 on				hook, Port 3 on hook,
Port	4	on hook, Port 5				on hook, Port 6 off			hook, Port 7 off	hook,
Port	8	off		hook,	Port 9 on hook, Port 10 on hook, Port 11 on hook,
Port	12		off hook, Port			13	on hook, Port 14		on hook, Port 15	on hook,
Port	16		on	hook,	Port 17 on hook, Port 18 off hook, Port 19					off hook,
Port	20		off hook, Port			21	on hook, Port 22		on hook, Port 23	on hook
Port	21		off hook, Port			22	on hook, Port 23		on hook, Port 24	on hook,
Port	25		on	hook,	Port 26 on hook, Port 27 off hook, Port 28					off hook,
Port	29		off hook

Performance counters and reporting

The MMI monitors the performance of the E1 link according to several performance criteria including errored, bursty, unavailable, loss-of-frame and frame-slip seconds. It registers the performance of these criteria by reading their status every second and counting their results. These counts are accumulated for an hour, then reset to 0. Previous hour count results are maintained for each of the previous 24 hours.

The LEI counts CRC-4 errors when CRC-4 is enabled and Bipolar Violations (BPV) when CRC-4 is disabled. The performance criteria for which these counts are maintained as follows:

•Errored seconds are seconds in which one or more CRC-4 / BPV errors, or one or more out-of-frame errors in one second.

•Bursty seconds are seconds in which more than one and less than 320 CRC-4 / BPV errors in a second.

•Severely errored seconds are seconds in which more than

320 CRC-4 / BPV errors, or one or more out-of-frames in a second.

•Unavailable seconds are seconds in which unavailable state starts with 10 consecutive severely errored seconds and ends with 10 consecutive non-severely errored seconds (excluding the final 10 non-severely errored seconds).

553-3001-211 Standard 2.00 September 2004