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MultiVOIP User Guide Operation & Maintenance
387
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 packets (which appear as
static).
“Clear”
button
-- Clears packet tallies from memory.
Total Packets Sum of data packets of all types.
Transmitt
ed
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.