Appendix D. Glossary

router

A device that supports communications between networks. Routers are similar to bridges, with the exception that routers provide more functionality (such as find- ing the best route between networks and providing network management capa- bilities).

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.

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 informa- tion sent along with the transmitted data.

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MX2800 STS-1 User Manual

61200659L1-1

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ADTRAN 4200659L2, 4200659L1, 4175043L2, 4200659L5, 4200659L8, 4200659L7, 4200659L3, 4200659L6, 4200659L4, 1200657L2, 1200291L1 Ses

1200287L1, 1200291L1, 1200657L2, 4200659L4, 4200659L6 specifications

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