Operation and Maintenance
T1 Statistics: Field Definitions (cont'd)
Field
Values
Name
Bipolar
Integer tally of
Violation
violation count
since last reset.
Receive Slip
Tally since last
reset.
Description
Two successive pulses of the same
polarity have been received and these
pulses are not part of zero substitution.
On an AMI-encoded line, this represents a
line error. On a B8ZS line, this may
represent the substitution for a string of 8
zeroes.
A receive slip (positive or negative) has
occurred. Slips indicate a clocking
mismatch (or lack of synchronization)
between T1/E1 devices. When slips occur,
data may be lost or repeated.
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