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Operation and Maintenance MultiVOIP User Guide
346
E1 Statistics: Field Definitions
(cont’d)
Field
Name
Values Description
Receive
Timeslot 16
Loss of
MultiFrame
Alignment
The framing pattern '0000' in 2
consecutive CAS multiframes were not
found or in all time slot 16 of the previous
multiframe all bits were reset.
Transmit
Line Open
At least 32 consecutive zeroes were
transmitted.
Transmit
Data
Underrun
For use by MTS Technical Support
Personnel.
Transmit
Slip
Negative
The frequency of the transmit clock is
greater than the frequency of the transmit
system interface working clock. A frame
is skipped.
Bipolar
Violation
Integer tally of
violation count
since last reset.
Bipolar Violation (or BPV) refers to two
successive pulses of the same polarity on
the E1 line. 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.
Excessive
Zeroes
Tally since last
reset.
Displayed value will increment if
consecutive zeroes beyond a set threshold
are detected. I.e., tally increments if more
than 7 consecutive zeroes in the received
data stream are detected under B8ZS line
coding, or if 15 consecutive zeroes are
detected under AMI line coding.
Transmit
Slip
Tally since last
reset.
Slip in transmitted data stream. Slips
indicate a clocking mismatch (or lack of
synchronization) between T1/E1 devices.
When slips occur, data may be lost or
repeated.
Receive Slip Tally since last
reset.
Slip in received data stream. Slips indicate a
clocking mismatch (or lack of synchronization)
between T1/E1 devices. When slips occur, data
may be lost or repeated.