Bell System Technical Journal

1970

DOI: 10.1002/j.1538-7305.1970.tb02503.x

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No. 1 ESS ADF: System Testing and Early Field Operation Experience

D. R. Barney¹,

P. K. Giloth²,

H. G. Kienzle³

Abstract: This article describes the equipment and test procedures used for system testing of a large store and forward system. It discusses a novel programmed computer load test facility for determining system operational characteristics in overload, system traffic handling capacity, and the adequacy of operational call register design. It presents early field experience with No. 1 ESS ADF controlling a very large nationwide data network for the Long Lines Department.

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Cited by 10 publications

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TSPS No. 1: System Testing

1970

Bell System Technical Journal

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The results of system testing against a set of performance criteria indicate the readiness of a new installation for service. In the first installation of TSPS No. 1 at Morristown, N. J., system testing also had to accomplish a design shakedown concurrent with final design and program debugging efforts at the Holmdel laboratory test model. This article describes the overall efforts and test facilities involved in the initial shakedown.

TSPS No. 1: System Testing

1970

Bell System Technical Journal

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The results of system testing against a set of performance criteria indicate the readiness of a new installation for service. In the first installation of TSPS No. 1 at Morristown, N. J., system testing also had to accomplish a design shakedown concurrent with final design and program debugging efforts at the Holmdel laboratory test model. This article describes the overall efforts and test facilities involved in the initial shakedown.

No. 1 ESS ADF: System Organization and Objectives

Ewin¹,

1970

Bell System Technical Journal

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This article describes the system organization and objectives of the No. 1 Electronic Switching System Arranged with Data Features. The new hardware and software designs required to adapt a No. 1 ESS to a store and forward system are outlined with emphasis on the techniques used to get large system capacity, continuous reliable operation, and flexible service features. System operation, traffic capacity, and use of the new system are also discussed in this introduction to seven detailed articles.

No. 1 ESS ADF: Teletypewriter Stations and Transmission Facilities

1970

Bell System Technical Journal

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A solid-state electronic station controller, small enough to be hxmsed within Model SS, SB and 37 teletypewriters, administers station on-line procedures. To realize automatic message reception and transmission at the station, the controller samples all traffic exchanged between the line and the station teletypewriter, detects measage-and device-control characters and generates and detects station-identity codes. In addition, the controller monitors the status of the station teletypewriter and provides appropriate alarms which are displayed on an attendant unit.Stations are linked to the No. 1 ESS ADF office via the Bell System's private line telegraph network. New ac and dc data sets have been developed to accommodate speeds up to SOO bauds with lower distortion and crosstalk generation than previously attainable with former transmission apparatus.

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