• ETRI Journal
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• v.11 no.4
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• pp.3-21
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• 1989

본고에서는 TDX 시스팀의 신뢰도 보증 및 효율적 관리를 위하여 TDX-1A 시스팀에서 사용되고 있는 부품의 신뢰도 예측치와 현장운용데이터에서 나온 신뢰도 평가치를 비교 검토한후, TDX-1A 시스팀의 신뢰도 예측결과를 검증하고, 또한 외국의 고장율 예측방법과의 차이점을 도출하여 이를 TDX 시스팀의 신뢰도 예측방법에 적용한 후 TBX-1A 현장운용데이터로 보완된 TDX 환경에 적합한 부품 고장율 예측방법을 정립, 제시하고자 한다.

• Information and Communications Magazine
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• v.6 no.1
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• pp.33-43
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• 1989

The subscriber & signal processing subystem of digital switching system TDX-1B has increased double in its capacity than TDX-1A, containing maximum 1024 subscribers per rack. It consists of subscriber interface devices, concentrating devices, signalling devices and controlling device in order to connect subscriber lines to switch network and supply subscriber signals for subscribers. This paper describes development procedures, principal functions of TDX-1B subscriber $ signal processing devices and the results.

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 1987.04a
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• pp.93-97
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• 1987

In this paper the data link control procedures for the TDX-1 ESS had been designed and implemented in accordance with the CCITT recommandation X.25 LAPB After a general discussion on intermational standards of link montrol procedures the TDX-1 data link control procedures are described in detail.

• The Transactions of the Korea Information Processing Society
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• v.7 no.9
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• pp.2930-2939
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• 2000

An AO/DI service was proposed to efficiently provide data communication service through the public network. It is planned to provide AO/DI service by the TDX -lOA switching system. It is necessary to evaluate the packet handling capacity of the TDX -lOA switching system in order to know whether its capacity is sufficient enough to accomodate AO/DI service or not. Simulation results show that TDX -lOA switching system can meet GoS(Grade of Service) requirements for AP/DI service until the AOIOI subscription rate of the ~.OOO ISDN subscribers becomes 29%.

• KIEAE Journal
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• v.4 no.3
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• pp.87-94
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• 2004

The purpose of this study is to improve thermal environment of telecommunication equipment rooms that hold TDX-10, TDX-100, 5ESS-2000, PCM of the latest telecommunication equipment. Analysis program is used the commercial CFD code, Star-CD and DOE-2.1E. The result has been compared by the energy consumption and the temperature contour at the 1 m height of room for each case. Different methods such as the relocation of the existing air-conditioner, the inflow of the ambient air into room, the installation of the forced fan and the cooling system equipment of the duct-connection type have been used to test for improvement of thermal environment. The analysis shows that most efficient method is the inflow of the ambient air into room but auxiliary equipment should be needed to prevent the local thermal spot.

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 1986.04a
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• pp.151-155
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• 1986

In this paper, we present the test result of TDX-1 call handling capacity. This result shown that the TDX-1 call handling capacity is appriximately 135, 000 BHCA.

• ETRI Journal
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• v.10 no.3
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• pp.165-169
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• 1988

본고에서는 TDX-1(A) 시스팀에서 적용된 블럭의 신뢰도 예측치와 현장운용 데이터에서 신뢰도를 비교 검토함으로써 TDX-1(A) 시스팀의 신뢰도 예측 결과를 검증하고, 현재 TDX시스팀에서 적용하고 있는 부품신뢰도 예측방법을 보완할 수 있는 의견을 제시하였다. 또한 시스팀의 고장요인을 H/W, S/W 및 Procedure Error로 분류하고 이들의 구성 비율을 예측치와 현장데이터로 비교하여 TDX 시스팀의 신뢰도를 확보하고 향상시키는데 도움이 되도록 하였다.

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 1987.04a
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• pp.79-81
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• 1987

The traffic characteristicsof digitalswich network depend on the structure blocking probability, path searching method and etc. This paper presents the study of TDX-1 swicth network traffic capacity by considering some decisive factors such as call processing software, switch network structrure and control schme Conclusively the study shows that the switch network of TDX-1 can handle approximately up to 1650 Erlang.

• Proceedings of the KIEE Conference
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• 1987.07b
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• pp.999-1002
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• 1987

This paper describes the architecture and basic function of alarm system for the TDX-1A digital switching system. Also, it is shown that implemented software structure for alarm treatment employed in distributed control system TDX-1A.

• Proceedings of the KIEE Conference
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• 1987.07b
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• pp.986-989
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• 1987

This paper describes the basic design concepts and architecture of the subscriber line test feature for the TDX-1A digital switching system. Also, implemented software structure for maintaining the multiprocessor control system employed in TDX-1A, which includes terminal server, MML, test, fault recognition and test result handling.