Appendix D. Glossary

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 T3SU 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.

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ADTRAN T3SU 300 user manual Wan, Yellow alarm