ATL Telecom AM200 - Manual (Page 145)

ATL User Guide
AM200 Modem
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TDM (Time Division Multiplexer) A device, which divides the time available on its trunk or
composite links among its channels.
TELNET Telnet is the TCP/IP standard protocol for remote terminal connection service. Telnet
allows a user at one site to interact with a remote host at another site as if the user's
terminal was directly connected to the remote machine.
Twisted Pair Twisted pair is the ordinary copper wire that connects home and many business
computers to the telephone company. To reduce potential signal interference
between pairs of wires, two insulated copper wires are twisted around each other.
UDP (User Datagram Protocol) UDP is a transport protocol designed to provide a
connectionless mode service. It does not provide the error handling and automatic
retransmission of TCP. UDP is defined in RFC-768.
V.11 ITU standard defining electrical characteristics for balanced double current
interchange circuits in the field of data communications.
V.24 / RS-232 This is a standard method of connecting a low speed serial channel. While V.24 and
RS-232 are actually separate standards, the terms are often used interchangeably to
refer to the type of serial port, which they describe.
V.35 ITU standard governing data transmission at 48kbps over 60- to 108-kHz group band
circuits. Has become a general mid- to high-speed interface with speeds up to 2
Mbps since its development.
WAN (Wide Area Network) A network that covers a large area, usually at relatively low
speed.
X.21 ITU standard for a serial Interface between DTE and DCE for synchronous operation
on public data networks. Uses V.11 electrical levels.