Nortel Networks 553-3001-211 manual Performance counters and reporting, Lti S/N

NT5D11 and NT5D14 Lineside T1 Interface cards Page 227 of 894

of the lineside T1 card. Entering the Display Status (D S) command set will cause a screen similar to the following to appear:

LTI S/N Software Version 1.01 3/03/95 1:50

In alarm state: NO

T1 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

Performance counters and reporting

The MMI monitors the performance of the T1 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, and then they are reset to 0. Previous hour count results are maintained for each hour for the previous 24 hours.

Performance counts are maintained for the following:

•Errored seconds – one or more CRC-6 errors, or one or more out of frame errors in a second.

•Bursty seconds – more than one and less than 320 CRC-6 errors in a second.

•Unavailable seconds – unavailable state starts with 10 consecutive severely errored seconds and ends with 10 consecutive severely errored seconds (excluding the final 10 non-severely errored seconds). Severely errored seconds are defined as more than 320 CRC-6 errors, or one or more out of frames in a second.

Circuit Card Description and Installation