Global Information Lookup Global Information

Service Evaluation System information


The Service Evaluation System (SES) was an operations support system developed by Bell Laboratories and used by telephone companies beginning in the late 1960s.[1] Many local, long distance, and operator circuit-switching systems provided special dedicated circuits to the SES to monitor the quality of customer connections during the call setup process. Calls were selected at random by switching systems and one-way voice connections were established to the SES monitoring center.[2]

During this era, most voice connections used analog trunk circuits that were designed to conform with the Via Net Loss plan established by Bell Laboratories. The purpose of the VNL plan and five-level long distance switching hierarchy was to minimize the number of trunk circuits in a call and maximize the voice quality of the connections. Excessive loss in a voice connection meant that subscribers may have difficulty hearing each other. This was particularly important in the 1960s when dial up data connections were developed with the use of analog modems. The SES evaluated multi-frequency outpulsing signaling as well as voice impairments including sound amplitude, noise, echo, and a variety of other parameters. Deployment of common-channel signaling systems such as Common Channel Interoffice Signaling and later Signaling System #7 obviated the need to monitor multi-frequency signaling as it became obsolete.

The Service Evaluation System was described in Notes on the Network published by AT&T in 1970, 1975, 1980 and later versions published by Bell Communications Research (now Telcordia Technologies) in 1983, 1986, 1990, 1994, and 2000.

  1. ^ Hester, S. D.; Parnas, D. L.; Utter, D. F. (October 1981). "Using documentation as a software design medium". The Bell System Technical Journal. 60 (8): 1941–1977. doi:10.1002/j.1538-7305.1981.tb00304.x. ISSN 0005-8580. S2CID 21203801.
  2. ^ Confalone, D. E.; Rogers, B. W.; Thornberry, R. J. (September 1982). "Stored Program Controlled Network: Calling Card Service-TSPS hardware, software, and signaling implementation". The Bell System Technical Journal. 61 (7): 1675–1714. doi:10.1002/j.1538-7305.1982.tb04368.x. ISSN 0005-8580. S2CID 29253175.

and 24 Related for: Service Evaluation System information

Request time (Page generated in 0.8995 seconds.)

Service Evaluation System

Last Update:

The Service Evaluation System (SES) was an operations support system developed by Bell Laboratories and used by telephone companies beginning in the late...

Word Count : 341

Operations support system

Last Update:

Center System (SCCS), Service Evaluation System (SES), Trunks Integrated Record Keeping System (TIRKS), and many more. OSS systems from this era are described...

Word Count : 1270

Evaluation

Last Update:

is of value." From this perspective, evaluation "is a contested term", as "evaluators" use the term evaluation to describe an assessment, or investigation...

Word Count : 4502

Selective Service System

Last Update:

The Selective Service System (SSS) is an independent agency of the United States government that maintains a database of registered male U.S. citizens...

Word Count : 7316

Systems development life cycle

Last Update:

documentation, and evaluation. A systems development life cycle is composed of distinct work phases that are used by systems engineers and systems developers...

Word Count : 3157

SES

Last Update:

in river deltas Service Engine Soon, a warning message on modern automobiles Service Evaluation System, an Operations Support System used by telephone...

Word Count : 588

National Park Service

Last Update:

National Park Service (NPS) is an agency of the United States federal government, within the U.S. Department of the Interior. The service manages all national...

Word Count : 10872

Trusted Computer System Evaluation Criteria

Last Update:

Trusted Computer System Evaluation Criteria (TCSEC) is a United States Government Department of Defense (DoD) standard that sets basic requirements for...

Word Count : 2101

Recommender system

Last Update:

considered as important aspects in evaluation. However, many of the classic evaluation measures are highly criticized. Evaluating the performance of a recommendation...

Word Count : 9789

Evaluation Assurance Level

Last Update:

The Evaluation Assurance Level (EAL1 through EAL7) of an IT product or system is a numerical grade assigned following the completion of a Common Criteria...

Word Count : 1785

Human resource management system

Last Update:

entry to conduct employee evaluation and to digitize reporting.[citation needed] The first enterprise resource planning (ERP) system that integrated human...

Word Count : 1758

World Education Services

Last Update:

National Association of Credential Evaluation Services (NACES) and the Alliance of Credential Evaluation Services of Canada (ACESC). The U.S. Department...

Word Count : 260

Atlantic Undersea Test and Evaluation Center

Last Update:

The United States Navy's Atlantic Undersea Test and Evaluation Center (AUTEC) is a laboratory that performs integrated three-dimensional hydrospace/aerospace...

Word Count : 1746

Enterprise information system

Last Update:

"Efficiency evaluation of enterprise information systems with nonuniform load" [Efficiency Evaluation of Enterprise Information Systems with Non-uniform...

Word Count : 480

System and Organization Controls

Last Update:

attestation or consulting engagements to evaluate and report on controls of information systems offered as a service. The engagements can be done on an entity...

Word Count : 1040

Verification and validation

Last Update:

Contrast with verification." "Verification. The evaluation of whether or not a product, service, or system complies with a regulation, requirement, specification...

Word Count : 4954

Program evaluation

Last Update:

Manager's Guide to Evaluation. Discussion of evaluation, includes chapters on Why evaluate, What is evaluation. BetterEvaluation BetterEvaluation: Sharing information...

Word Count : 10806

Services Selection Board

Last Update:

Forces. The board evaluates the suitability of the candidate for becoming an officer using a standardized protocol of evaluation system which constitutes...

Word Count : 1686

Physical Evaluation Board

Last Update:

..Service members may appeal the decision of the PEB. The PEB process includes the informal physical evaluation board, formal physical evaluation board...

Word Count : 1508

Conservation Reporting and Evaluation System

Last Update:

The Conservation Reporting and Evaluation System (CRES) is the system used by the Natural Resources Conservation Service (NRCS) in the United States to...

Word Count : 108

Common Criteria

Last Update:

security products and systems. Target of Evaluation (TOE) – the product or system that is the subject of the evaluation. The evaluation serves to validate...

Word Count : 3714

Mark 92 Guided Missile Fire Control System

Last Update:

1975. Introduction to the fleet and follow-on test and evaluation began in 1978. The Mark 92 system assigns targets via the ship's air search radar, and...

Word Count : 533

Global Positioning System

Last Update:

The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radio navigation system owned by the United States government and operated...

Word Count : 18499

Operational Test and Evaluation Force

Last Update:

and Evaluation Force (OPTEVFOR) is an independent and objective agency within the United States Navy for the operational testing and evaluation (OT&E)...

Word Count : 3564

PDF Search Engine © AllGlobal.net