Multitech MULTIVOIP MVP-810ST User's Guide download pdf (Page 426)

Operation and Maintenance MultiVOIP User Guide

426

IP Statistics: Field Definitions

Field

Name

Values Description

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

p

ackets (which a

pp

ear as static).

“Clear”

b

utton

-- Clears packet tallies from memory.

Total Packets Sum of data

p

ackets of all t

yp

es.

Transmit

ted

integer

value

Total number of packets transmitted by

this VOIP gateway since the last

“clearing” or resetting of the counter

within the MultiVOIP software.

Received integer

value

Total number of packets received by this

VOIP gateway since the last “clearing” or

resetting of the counter within the

MultiVOIP software.

1 2 ... 421 422 423 424 425 426 427 428 429 430 431 ... 558 559

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