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Operation & Maintenance MultiVOIP User Guide
396
T1 Statistics: Field Definitions (cont’d)
Field
Name
Values Description
Yellow Alarm Tally since last
reset.
The alarm signal sent by a remote T1/E1
device to indicate that it sees no receive signal
or cannot synchronize on the receive signal.
Frame Search
Restart Flag
[To be supplied.]
Loss of
MultiFrame
Alignment
Tally since last
reset.
In D4 or ESF mode, displayed value will
increment if multiframe alignment has been
lost or if loss of frame alignment has been
detected.
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.
Pulse Density
Violation
The pulse density of the received data stream
is below the requirement defined by ANSI
T1.403 or more than 15 consecutive zeros are
detected.
Line
Loopback
Activation
Signal
The line loopback activation signal has
been detected in the received bit stream.
Transmit Line
Open
At least 32 consecutive zeros 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.