ADTRAN MX2800 M13 - Manual (Page 189)

MX2800 M13 Multiplexer User Manual Glossary, Appendix E
61200290L1-1G E-7
SNMP Simple network management protocol. A control and reporting scheme widely
used to manage devices from various vendors. SNMP operates on top of the Inter-
net protocol.
SONET Synchronous optical network. A standard format for transporting a wide range of
digital telecommunications services over optical fiber. SONET is characterized by
standard line rates, optical interfaces, and signal formats.
SR Data set ready. A signal on the DTE interface that indicates if a connection exists
and if the devices are ready to start handshaking control signals so communica-
tions can begin.
synchronous Communications in which the timing is achieved by sharing a single clock. Each
end of the transmission synchronizes itself with the use of clocks and information
sent along with the transmitted data.
T
T1 Transmission rates of 1.544 Mbps are available on T1 communication lines. Also
referred to as digital signal Level 1 (DS-1). See also
E1 .
T3 Transmission rates of 44.736 Mbps are available on T3 communication lines.
Also referred to as digital signal Level 3 (DS-3).
TDM Time division multiplexing. A technique for transmitting two or more signals at
the same time over a single communication medium. This is accomplished by
allocating channels to the bandwidth for specific increments of time.
Telnet The standard TCP/IP remote login protocol specified in RFC-854.
transceiver A combination of transmitter and receiver, providing both output and input inter-
faces within a single device.
transmission The signaling of data over telecommunications channels.
V
V.35 A standard for trunk interface between a network access device and a packet
network that defines signaling for data rates greater than 19.2 kbps.
VT100 A non intelligent terminal or terminal emulation mode used for asynchronous
communications. Used to configure the MX2800.
W
WAN Wide area network. A communications network serving geographically separate
areas. A WAN typically extends a LAN outside the building to link to other LANs
over telephone lines.