A Unigauge Design Concept for Telephone Customer Loop Plant

Gresh, P.; Howson, Louis R.; Lowe, A.; Zarouni, A.

doi:10.1109/tcom.1968.1089823

IEEE Trans. Commun.

1968

DOI: 10.1109/tcom.1968.1089823

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A Unigauge Design Concept for Telephone Customer Loop Plant

P. Gresh¹,

Louis R. Howson²,

A. Lowe³

et al.

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1973

1980

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Cited by 3 publications

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“…2 ESS) [ l ] , which provides economical service to'customers on loops up to 2500 !2 instead of the normal 1300 a. This feature is provided as part of the Bell System unigauge plan [2] that attempts to standardize the use of a single wire size, 26 gauge, in the majority of the subscriber cable facilities. The unigauge plan reduces the amount of copper used, allows more pairs to fit into existing underground conduit, and simplifies office records by reducing the use of mixed gauges and the required number of loading coils.…”

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No. 2 ESS Unigauge Range Extension

Beuscher¹,

Deisch²

1973

IEEE Trans. Commun.

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Abssirucsi-Range extension allows the No. 2 electronic switching system (No. 2 ESS) to serve subscriber loops out to 2500 SZ as part of the Bell System's unigauge plan. Rangeextender circuits provide both audio and dc gain for loops greater than 1300 SZ. These circuits have been designed specifically to be low cost, as small as possible, and to use minimum power. Network concentration allows 70 percent fewer range extenders to be provided than customer Lines served. All trunk, service, and test circuits that had to be modified to work range extended are provided on a standard basis in every No. 2 ESS office. This means that range extension can be provided in a No. 2 ESS office at very low cost; essentially the cost of the rangeextender circuits.

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“…This means the cost of adding range extension to an existing No. 2 11. RANGE-EXTENDER REPEATER As shown in Fig.…”

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No. 2 ESS Unigauge Range Extension

Beuscher¹,

Deisch²

1973

IEEE Trans. Commun.

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Loop Plant Electronics: Voice Frequency Electronics for Loop Applications

Hawley¹,

Stiefel²

1978

Bell System Technical Journal

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Over the past 100 years the telephone loop connecting central office switching equipment and the telephone customer's premises has evolved from aerial open wire to buried plastic‐insulated twisted pairs. In the last 20 years the use of electronic circuits for range extension has become popular. These circuits allow use of higher resistance loops (finer gauge wires) than central offices are normally designed to accept. This paper reviews some of this history, describes rural and suburban systems of voice frequency range extension, presents requirements and circuit design considerations, and compares several electronic range extender circuits currently used to implement these systems.

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The CREG System Plan

Ciesielka¹,

Greco²,

Hawley³

et al. 1980

IEEE Trans. Commun.

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Abstruct-The CWEG concept extends the loop signaling and transmission range of No. 1/1A and No. 2/2B ESS to 2800 0. This is accomplished by embedding range extension and gain circuits in the B-links of the ESS networks behind the first stage of switching concentration. The 2800 R design limit for loops permits greatly increased use of lower cost, tine gauge cables. Loops up to 33 kft from the central office can be served with all 26 gauge facilities. Placing the range extension equipment in the ESS network takes advantage of the switching system's inherent concentration to reduce the effective range extension cost per treated line by a factor approaching 75 percent. C

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A Unigauge Design Concept for Telephone Customer Loop Plant

Cited by 3 publications

References 0 publications

No. 2 ESS Unigauge Range Extension

No. 2 ESS Unigauge Range Extension

Loop Plant Electronics: Voice Frequency Electronics for Loop Applications

The CREG System Plan

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