Operation Manual

AT-RG213 Residential VoIP Gateway - SIP Software Reference Manual
SIP Software Release 6-0-0
J613-M0524-00
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synchronous Transmission in which the data characters and bits are
transmitted at a fixed rate with the transmitter and receiver synchronised.
This eliminates the need for start-stop elements, as in asynchronous
transmission, but requires a flag character to be transmitted when there is no
data to transmit. See asynchronous.
T
TCP Transmission Control Protocol. The TCP/IP standard transport layer
protocol in the Internet suite of protocols, providing reliable, connection-
oriented, full-duplex streams. It uses IP for delivery.
TCP/IP Protocol Suite Transmission Control Protocol over Internet Protocol.
This is a common shorthand which refers to the suite of transport and
application protocols which runs over IP. See IP, ICMP, TCP, UDP, FTP,
Telnet, SNMP.
telephony The science of translating sound into electrical signals,
transmitting them, and then converting them back into sound.
telnet The virtual terminal protocol in the TCP/IP suite of protocols, which
allows users of one host to log into a remote host and interact as normal
terminal users of that host.
TFTP Trivial File Transfer Protocol. The TCP/IP standard protocol for file
transfer with minimal capability and minimum overhead, based on UDP. It
is often used by diskless workstations that keep software in ROM and use it
to bootstrap themselves. It is used in the router for downloading patches.
U
UDP User Datagram Protocol. A transport layer protocol in the TCP/IP suite
of protocols. UDP, like TCP, uses IP for delivery; however, unlike TCP, UDP
provides for exchange of datagrams without acknowledgements or
guaranteed delivery.
unicast A packet broadcast to a single host attached to the network. See
broadcast, directed broadcast, multicast.
V
VLAN Virtual Local Area Network. Secure connection of TCP/IP based
networks, intranets and extranets across the Internet
VPN Virtual Private Network. A private network built over an insecure public
network, such as the Internet, in which communication between peer sites is
encrypted to prevent unauthorised monitoring of session data and
unauthorised access into the VPN from the public network.
VT-100 A popular model of DEC terminal. Many third party vendors make
VT-100 compatible terminals. The term VT-100 is also used to describe the
characteristics of terminals that may be connected to a device.