New Technology for Loops--A Plan for the '80's

Ciesielka, A.; Long, N. Hung

doi:10.1109/tcom.1980.1094746

Cited by 4 publications

(1 citation statement)

References 5 publications

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“…On the other hand, feeder networks are designed to meet only the medium-term demand; telephone companies periodically review and increase feeder capacity to accomodate demand growth and customer movement (Ciesielka and Long (1980), Elken (1980), Friedenfelds and McLauglin (1979)). …”

Section: Evolution Of the Local Access Networkmentioning

confidence: 99%

Models for planning capacity expansion in local access telecommunication networks

Balakrishnan¹,

Magnanti²,

Shulman³

et al. 1991

Ann Oper Res

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Section: Evolution Of the Local Access Networkmentioning

confidence: 99%

Models for planning capacity expansion in local access telecommunication networks

Balakrishnan¹,

Magnanti²,

Shulman³

et al. 1991

Ann Oper Res

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Feeder Planning Methods for Digital Loop Carrier

Bulcha¹,

Kodrich²,

Luber³

et al. 1982

Bell System Technical Journal

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This paper describes three new approaches to planning for digital loop carrier (dlc) in the exchange feeder loop network. Two of these are manual planning methods that are used to determine the most economical technology for satisfying facility shortages along a feeder route. Both are based on the concept of a distance‐oriented crossover point beyond which dlc is the economic relief technology. One of the methods uses a global crossover point for all routes, and the other uses a route‐specific crossover point The third approach is a mechanized tool, the Pair Gain Planning (pgp) program. pgp, which is implemented as a module within the existing Bell System loop planning system, first identifies the appropriate technology for relief and then synthesizes a specific dlc implementation plan. A discussion of system performance and projected Bell System applications of the various methods is included.

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D4 Digital Channel Bank Family: TheSLC™-96 System

Cho¹,

Olson²,

Williamson³

1982

Bell System Technical Journal

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The SLC*‐96 system is a digital subscriber carrier system that can carry up to 96 subscriber channels, when fully equipped, between a Central Office Terminal (cot) and a Remote Terminal (rt), using T1 digital lines. Typical economic applications are for expanding the service capability of existing cable plant or for new wire center deferral. Recent application studies show that SLC‐96 systems will be economically attractive in many permanent subscriber applications. In addition to Message Telephone Service (mts), the system can provide coin services, voice‐frequency special services, and digital data services. The SLC‐96 system is based on the transmission and physical format of the D4 system used for interoffice trunks. The system employs μ255 pulse code modulation (pcm) for voice transmission and, as a result, will allow the direct interface of the rt with a digital central office. Its maintenance features include channel and drop testing from a local test desk; single‐ended, active, T1 fault‐locating; automatic T1 line protection; extensive local and remote alarm displays; and outputs that can be transmitted to a remote operations center such as the Switching Control Center (scc). The channel and drop testing scheme requires a Pair Gain Test Controller (pgtc) to be installed in each wire center containing one or more SLC‐96 systems. Various other features that will enhance the application of the SLC‐96 system in the loop plant include extended range channel units, remote T1 line power feed, and a variety of RT enclosures.

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New Technology for Loops--A Plan for the '80's

Cited by 4 publications

References 5 publications

Models for planning capacity expansion in local access telecommunication networks

Models for planning capacity expansion in local access telecommunication networks

Feeder Planning Methods for Digital Loop Carrier

D4 Digital Channel Bank Family: TheSLC™-96 System

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