Multi-Tech Systems MVP-2410, MVP-3010, MultiVOIPTM, E1 manual 286

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

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