ZyXEL Communications 56K manual Irc, Isp, Itu-Tss, Lan, Lapm, Lata, Lec, Led

User's Guide for ZyXEL Omni 56K USB Modem

	now (July 1995) connects roughly 60,000 independent networks into a vast global internet.
Interrupt	In a computer, some tasks must be performed regularly and without delay. This is possible
	because the CPUs provide special interrupt vectors. These vectors each point to some short
	program sequence. An interrupt stops the currently running program and the segment to
	which the vector points is executed.
Intranet	A private network inside a company or organization that uses the same kinds of software
	that you would find on the public Internet, but that is only for internal use.
IP	Internet Protocol. The IP (currently IP version 4, or IPv4), is the underlying protocol for
	routing packets on the Internet and other TCP/IP-based networks.
IRC	Internet Relay Chat. IRC was developed in the late 1980s as a way for multiple users on a
	system to “chat” over the network. Today IRC is a very popular way to “talk” in real time
	with other people on the Internet. However, IRC is also one avenue hackers use to get
	information from you about your system and your company. Moreover, IRC sessions are
	prone to numerous attacks that while not dangerous can cause your system to crash.
ISP	Internet Service Providers provide connections into the Internet for home users and
	businesses. There are local, regional, national, and global ISPs. You can think of local ISPs
	as the gatekeepers into the Internet.
ITU-TSS	International Telecommunications Union – Telecommunication Standards Sector. New
	name for the standard making organization CCITT. See CCITT.
Jack Type	Different types of jacks (RJ11, RJ45, or RJ48) can be used for an ISDN line. The RJ11 is
	the most common in the world and is most often used for analog phones, modems, and fax
	machines. RJ45 and RJ48 are essentially the same, as they both have the same 8-pin
	configuration. An RJ11 jack can fit into an RJ45/RJ48 connector, however, an RJ45/RJ48
	cannot fit into an RJ11 connector.
LAN	Local Area Network is a shared communication system to which many computers are
	attached. A LAN, as its name implies, is limited to a local area. This has to do more with
	the electrical characteristics of the medium than the fact that many early LANs were
	designed for departments, although the latter accurately describes a LAN as well. LANs
	have different topologies, the most common being the linear bus and the star configuration.
LAPM	Link Access Procedure for Modems – a protocol that controls the handshake between two
	modems.
LATA	(Local Access and Transport Area): A geographic territory used primarily by local
	telephone companies to determine charges for intrastate calls. As a result of the Bell
	divestiture, switched calls that both begin and end at points within the LATA (intraLATA)
	are generally the sole responsibility of the local telephone company, while calls that cross
	outside the LATA (interLATA) are passed on to an Inter eXchange Carrier (IXC).
Layer Protocol	A standard of the ISO (International Standards Organization) which defines everything
	regarding data communications from the hardware to the screen display in seven levels.
LEC	(Local Exchange Carrier): The local phone companies – either a Regional Bell Operating
	Company (RBOC) or an independent phone company (e.g., GTE) – that provide local
	transmission services.
LED	Light Emitting Diode – a display element.

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