ADTRAN TOTAL ACCESS MX2800, Руководство пользователя, Страница: 127 / 142

Appendix D. Glossary
61200290L1-1 MX2800 User Manual D-9
red alarm
unframed all ones signal (keep alive signal). A red alarm is declared on detection
of LOS or OOF not caused by an alarm indication signal (AIS) that persists for
more than two seconds.
remote configuration
A feature designed into ADTRAN products that allows remote units to be con-
figured from a local unit or a VT 100 compatible terminal.
router
A device that supports communications between networks. Routers are similar
to bridges, with the exception that routers provide more functionality (such as
finding the best route between networks and providing network management
capabilities).
service
The provision of telecommunications to customers by a common carrier, admin-
istration, or private operating agency using voice, data, and/or video technolo-
gies.
service provider
A company that delivers or sells a telecom service.
SES
severely errored seconds. A second in which more than 320 code violations
(CVs) occurred or an OOF condition occurred.
signaling
Communication between switches to set up and terminate calls.
SNMP
simple network management protocol. A control and reporting scheme widely
used to manage devices from different vendors. SNMP operates on top of the
Internet 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.