VOICE OVER IP INTERFACE
Installation and Operation Manual
31
Logs Screen Details: Field Definitions (cont’d)
Supplementary Services Info
(Not
supported in BRI 502c software.)
Call Transferred To
phone number
string
Number of party called in transfer.
Call Forwarded To
phone number
string
Number of party called in
forwarding.
CT Ph#
phone number
string
Call Transfer phone number.
About IP Statistics
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
irretrievable; 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.
Transmitted
integer
value
Total number of packets transmitted by this
VOIP gateway since the last “clearing” or
resetting of the counter within the VOIP
Interface software.
Received
integer
value
Total number of packets received by this VOIP
gateway since the last “clearing” or resetting of
the counter within the VOIP Interface software.
