No.4 ESS: Peripheral System

Huttenhoff, J. H.; Janik, Jr. John; Johnson, Garett D.; Schleicher, W. R.; Slana, Matthew F.; Tendick, F. H.

doi:10.1002/j.1538-7305.1977.tb00555.x

Cited by 15 publications

(1 citation statement)

References 3 publications

(3 reference statements)

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“…T h e 1A processor issues mainte nance c o m m a n d s to the V I F through maintenance pulse points from a signal processor. 5 T h e V I F replies to the 1A via t h e peripheral unit reply bus ( P U R B ) . T h e E S T communicates with t h e 1A through a full peripheral unit b u s 5 ( P U B ) , E S T c o m m a n d s are issued from the 1A via the peripheral unit write bus ( P U W B ) , and the replies return by way of the P U R B .…”

Section: Maintenance Of Vif and Estmentioning

confidence: 99%

UNIX Time-Sharing System: No. 4 ESS Diagnostic Environment

Pekarich¹

1978

Bell System Technical Journal

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Maintenance and testing of the Voiceband Interface and the EchoThe minicomputer chosen to support this environment was also required to support the development of more than one frame at the same time. Because of this requirement and other reasons, the UNIX* operating sys tem was selected for software support and development. This paper describes how the UNIX operating system was applied to this project.

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Section: Maintenance Of Vif and Estmentioning

confidence: 99%

UNIX Time-Sharing System: No. 4 ESS Diagnostic Environment

Pekarich¹

1978

Bell System Technical Journal

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On pair relationships in time-division switching network

Saito¹,

Ogino²,

Goto³

et al. 1981

Electron. commun. Jpn.

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On pair relationships in time‐division switching network

Saito

Ogino

Goto

et al. 1981

Electron. Comm. Jpn. Pt. I

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Since a PCM transmission path can carry voice signals in one direction, the time‐division switching network at any PCM telephone exchanges employs a four‐wire configuration. Therefore, a pair of paths is required to form one connection. A general way of preparing such pairs is to establish the pair relationships between switches or links in the switching networks and to create paths automatically based upon those relationships. Having implemented these pair relationships, the blocking probability, the amount of path hunting and the required amount of control hardware for switching networks can be reduced considerably. Pair relationships are quite important in the efficient composition of time‐division switching networks. However, no general theory exists yet for the pair relationships. This report presents an overall study on the pair relationships in time‐division switching networks. First, we define the pair relationships and classify them into several forms and then present practical examples. We then describe how to compose the more important pair relationships and briefly review the connection patterns that are produced by forming the pair relationships and modifying link connection patterns. Finally, we explain how to compose favorable pair relationships based on the above study conclusions.

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No.4 ESS: Peripheral System

Cited by 15 publications

References 3 publications

UNIX Time-Sharing System: No. 4 ESS Diagnostic Environment

UNIX Time-Sharing System: No. 4 ESS Diagnostic Environment

On pair relationships in time-division switching network

On pair relationships in time‐division switching network

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