Multi-Tech Systems MVP-410ST/810ST IP Statistics Field Definitions Values Description Name, 426

Operation and Maintenance			MultiVOIP User Guide
		IP Statistics: Field Definitions
	Field	Values	Description
	Name
			UDP versus TCP. (User Datagram
			Protocol versus Transmission Control
			Protocol). UDP provides
			unguaranteed, connectionless
			transmission of data across an IP
			network. By contrast, TCP provides
			reliable, connection-oriented
			transmission of data.
			Both TCP and UDP split data into
			packets called “datagrams.” However,
			TCP includes extra headers in the
			datagram to enable retransmission of
			lost packets and reassembly of packets
			into their correct order if they arrive out
			of order. UDP does not provide this.
			Lost UDP packets are unretrievable;
			that is, out-of-order UDP packets
			cannot be reconstituted in their proper
			order..
			Despite these obvious disadvantages,
			UDP packets can be transmitted much
			faster than TCP packets -- as much as
			three times faster. In certain
			applications, like audio and video data
			transmission, the need for high speed
			outweighs the need for verified data
			integrity. Sound or pictures often
			remain intelligible despite a certain
			amount of lost or disordered data
			packets (which appear as static).
	“Clear”	--	Clears packet tallies from memory.
	button
	Total	Packets	Sum of data packets of all types.
	Transmit	integer	Total number of packets transmitted by
	ted	value	this VOIP gateway since the last
			“clearing” or resetting of the counter
			within the MultiVOIP software.
	Received	integer	Total number of packets received by this
		value	VOIP gateway since the last “clearing” or
			resetting of the counter within the
			MultiVOIP software.

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