Nortel Circuit Card Installation Manual page 304

Page 304 of 906
Figure 54
Display Status (D S) screen
LEI S/N Software Version 1.01
In alarm state:
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
553-3001-211 Standard 3.00
NT5D33 and NT5D34 Lineside E1 Interface cards
NO
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).
August 2005
3/03/95 1:50