NetComm V85 manual Tftp, Ttl, Usb, Vci, Vpi, Wan

	while IP is responsible for delivering the packets from source
	to destination. When TCP and IP are bundled with higher-level
	applications such as HTTP, FTP, Telnet, etc., TCP/IP refers to this
	whole suite of protocols.
Telnet	An interactive, character-based program used to access a remote
	computer. While HTTP (the web protocol) and FTP only allow you
	to download files from a remote computer, Telnet allows you to log
	into and use a computer from a remote location.
TFTP	Trivial File Transfer Protocol. A protocol for file transfers, TFTP is
	easier to use than File Transfer Protocol (FTP) but not as capable or
	secure.
TTL	Time To Live A field in an IP packet that limits the life span of that
	packet. Originally meant as a time duration, the TTL is usually
	represented instead as a maximum hop count; each router that
	receives a packet decrements this field by one. When the TTL
	reaches zero, the packet is discarded.
Twisted pair	The ordinary copper telephone wiring long used by telephone
	companies. It contains one or more wire pairs twisted together to
	reduce inductance and noise. Each telephone line uses one pair. In
	homes, it is most often installed with two pairs. For Ethernet LANs,
	a higher grade called Category 3 (CAT 3) is used for 10BASE-T
	networks, and an even higher grade called Category 5 (CAT 5) is
	used for 100BASE-T networks. See also 10BASE-T, 100BASE-T,
	Ethernet.
upstream	The direction of data transmission from the user to the Internet.
USB	Universal Serial Bus A serial interface that lets you connect devices
	such as printers, scanners, etc. to your computer by simply plugging
	them in. The ADSL modem is equipped with a USB interface for
	connecting to a stand-alone PC.
VC	Virtual Circuit A connection from your ADSL modem to your ISP.
VCI	Virtual Circuit Identifier Together with the Virtual Path Identifier
	(VPI), the VCI uniquely identifies a VC. Your ISP will tell you the
	VCI for each VC they provide. See also VC.
VPI	Virtual Path Identifier Together with the Virtual Circuit Identifier
	(VCI), the VPI uniquely identifies a VC. Your ISP will tell you the
	VPI for each VC they provide. See also VC.
WAN	Wide Area Network Any network spread over a large geo graphical
	area, such as a country or continent. With respect to the ADSL
	modem, WAN refers to the Internet.
Web browser	A software program that uses Hyper-Text Transfer Protocol (HTTP)
	to download information from (and upload to) web sites, and
	displays the information, which may consist of text, graphic images,
	audio, or video, to the user. Web browsers use Hyper-Text Transfer

V85 Desktop VoIP Phone User Guide	55
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