ADTRAN 1200218L1, User Manual

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Appendix D. Glossary
61200663L1-1 OSU 300 User Manual D-11
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
interfaces within a single device.
transmission
The signaling of data over telecommunications channels.
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.
VT 100
A non-intelligent terminal or terminal emulation mode used for asynchronous
communications. Used to configure the OSU 300.
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.
yellow alarm
A T3 yellow alarm is an indication sent back toward the source of a failed trans-
mit circuit in a DS3 two-way transmission path. The X-bits (X1 and X2) are set to
zero.