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Operation & Maintenance MultiVOIP User Guide
400
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.