The reliability of LEC telephone networks

Author

Fagerstrom, Richard ; Healy, John

Author_Institution

Bellcore, Red Bank, NJ, USA

Volume

31

Issue

6

fYear

1993

fDate

6/1/1993 12:00:00 AM

Firstpage

44

Lastpage

48

Abstract

The reliability of local exchange carrier (LEC) networks is described using data obtained from diverse sources. These sources are Bellcore´s Outage Performance Monitoring (OPM) process, which is designed to collect information on switch outages lasting two minutes or longer, the Automated Report Management Information System (ARMIS), which supplies reports to the US Federal Communications Commission (FCC) to show industry trends in network reliability, and the US General Accounting Office (GAO), which has recently collected information on each outage lasting at least 15 min and affecting at least 10000 lines during 1990 and 1991. The data show that the availability of network switches is at least 99.9981%, meaning that 99.9981% of the time a customer wants to make an intraoffice call, the switch will be up. The chance that the path between two switches is available is 99.9986%. For interoffice calls involving two switches, the availability of the interoffice network is estimated to be 99.9948%.<>

Keywords

reliability; telephone networks; Automated Report Management Information System; Bellcore´s Outage Performance Monitoring; LEC; US General Accounting Office; availability; interoffice calls; intraoffice call; local exchange carrier; reliability; switch outages; telephone networks; Availability; Communication industry; Communication switching; Computerized monitoring; FCC; Management information systems; Process design; Switches; Telecommunication network reliability; Telephony;

fLanguage

English

Journal_Title

Communications Magazine, IEEE

Publisher

ieee

ISSN

0163-6804

Type

jour

DOI

10.1109/35.214890

Filename

214890