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Glossary
Voice Gateways System Manual 99
SNMP Simple Network Management Protocol. A network management
protocol that provides a means to monitor and control network
devices, and to manage configurations, statistics collection,
performance, and security. SNMP works by sending messages,
called protocol data units (PDUs), to different parts of a
network. SNMP-compliant devices, called agents, store data
about themselves in Management Information Bases (MIBs)
and return this data to the SNMP requesters.
SS Silence Suppression: A method for eliminating wasted
bandwidth when sending voice over a packet-switched system.
STUN Simple Traversal of UDP: A method of NAT traversal through
UDP, based on RFC 3489.
SU Subscriber Unit
T.38 This is the ITU-T recommendation which defines a real time
method for fax over IP networks.
TCP Transmission Control Protocol. Connection-oriented transport
layer protocol that provides reliable full-duplex data
transmission. TCP is the part of the TCP/IP suite of protocols
that is responsible for forming data connections between nodes
that are reliable, as opposed to IP, which is connectionless and
unreliable.
TCP/IP Transmission Control Protocol/Internet Protocol. A set of
protocols developed by the U.S. Department of Defense to allow
communication between dissimilar networks and systems over
long distances. TCP/IP is the de facto standard for data
transmission over networks, including the Internet.
TFTP Trivial File Transfer Protocol. Simplified version of FTP that
allows files to be transferred from one computer to another
over a network, usually without the use of client
authentication.
ToS Type Of Service: A field in an IP packet (IP datagram) that is
used for quality of service (QoS).
UDP User Datagram Protocol. Connectionless transport layer
protocol in the TCP/IP protocol stack. UDP is a simple protocol
that exchanges datagrams without acknowledgments or
guaranteed delivery, requiring that error processing and
retransmission be handled by other protocols. UDP is defined
in RFC 768.