Nortel 5399 User Manual page 48

Chapter 1 Network Administration
Model 5399 Remote Access Concentrator Network Administrator's Guide for UNIX
A-44
Table B-14. Fields in the stats –T Command Display (Continued)
Field Description
Circuit ID The T1/PRI engine's Circuit ID displayed from the
tni_circuit_id parameter.
Loopback The loopback status has the following possible states:
mode
Loopback – Loopback is in progress.
No Loopback – There is no loopback in progress. The
test LED on the front panel is not illuminated.
Number of Part of the current report that indicates the number of
Valid Seconds seconds for which statistics data has been collected.
CRC6 Error A CRC6 error occurs when the six-bit CRC field
Event calculated by the customer installation, based on the
incoming DS1 signal, does not agree with the CRC field
contained in the DS1 signal received from the network.
Out of Frame An Out of Frame (OOF) event begins when any two of
four consecutive frame synchronizing bits are received
from the network interface. An OOF state ends when
reframe occurs.
ESF Error An Extended Superframe CRC error.
Event
Errored An Errored Second is a second with one or more ESF
Seconds error events, that is, one or more CRC error events or one
or more Out of Frames (OOFs).
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