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Appendix D. Glossary
61200659L1-1 MX2800 STS-1 User Manual D-11
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. 3 5
A standard for trunk interface between a network access device and a packet net-
work 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 MX2800 STS-1.
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.