• Title/Summary/Keyword: telephone call

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Development of the RAS-RMS Protocol optimized to PSTN environment and Implementation of its differentiated process (PSTN 환경에 최적화된 RAS-RMS 연동 프로토콜 개발 및 차별화된 처리과정 구축)

  • Chang, Sung-Keun;Lee, Jung-Ho
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.16 no.12
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    • pp.8357-8362
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    • 2015
  • The emergency call device has been installed and operated for the elevator passenger safety, but the call can not be connected or delay to the operator in an emergency. The application of the Internet of Things(IoT) technology is required for the systematic management and reliability of the emergency call device installed in the elevator. To meet these requirements it is necessary to apply the RMS(Remote Management System). Emergency call device periodically reports the operating status information and the emergency call history information of the emergency call device to the RMS in the PSTN(Public Switched Telephone Network) environment, and transmits the call request information in an emergency. RAS(Remote Access Server) plays a role of converting the PSTN signals to TCP / IP. RMS reports a significant outbreak call and abnormal operating conditions to administrators. In this study, we developed optimized protocol to PSTN environment that is required by RMS and implemented its differentiated process. And a RAS-RMS Protocol was added to the Application Layer. Development protocol consisting of simple structure as compared to CoAP, MQTT or HTTP can work properly in low-spec CPU and transmit elevator emergency key information easily.

전화망과 패킷망간 연동장치 서비스 및 설계

  • Sin, Yeong-Seok;Jeong, Tae-Su;Park, Hui-Yong;Lee, Hyeon-Tae;Choe, Seong-Su
    • ETRI Journal
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    • v.11 no.1
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    • pp.136-144
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    • 1989
  • This paper presents the interworking services and the call connection procedures in the PSTN-PSDN(Public Switched Telephone Network-Packet Switched Data Network) Interworking System(IWS). Also the architecture and design for the software and hardware in IWS are described.

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The Implementation of VoIP Terminal using PPTP for Voice Security (PPTP를 이용한 VoIP 음성보안 단말기 구현)

  • Kim, Sam-Taek
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.9 no.2
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    • pp.73-80
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    • 2009
  • Although it is relatively difficult to eavesdrop the commonly used PSTN in that it is connected with direct circuit, it is difficult to ensure the secret of call on Internet because many users can connect to the Internet at the same time. However, it is needed to ensure secret of voice call in a special situation. Due to the fact that many users can connect to the internet at the same time, VoIP can always be in a defenseless state by hackers. Therefore, in this paper, we have developed the increased voice security internet telephone terminal and measured conversation quality by adopting VPN PPTP based on SIP and using tunnel method in transmitting voice data to prevent eavesdrop of internet telephone.

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Development of a Program for Anger Management Based on Self-efficacy in Patients with Breast Cancer (유방암 환자의 분노관리 자기효능감 증진 프로그램 개발)

  • Oh, Pok-Ja;Choi, Seung-Yi
    • Korean Journal of Adult Nursing
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    • v.21 no.2
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    • pp.199-211
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    • 2009
  • Purpose: The purpose of this study was to develop a program for anger management based on self-efficacy. Methods: In this study, four types of approaches to enhance anger control were developed; 1) a role play for vicarious experiences; 2) an assertive training for anger expression; 3) a 30-minute long education program & a 20-minute long telephone call coaching for verbal persuasion; and 4) a booklet for anger management and self care behaviors. One group pretest-posttest design was used for evaluating the program. Study subjects were 6 cancer patients undergoing chemotherapy. The group were received a 4-week intervention, 60 ~ 90 minutes a day weekly, and measured the variables at baseline, 4 weeks later. Anger-in, anger-out, and anger-control were measured by STAXI-K. Data was analysed by Wilcoxon using SPSS/WIN 12.0 program. Anger situation was analysed according to primary anger-thoughts and secondary anger-thoughts based on cognitive theories of anger. Results: The program for anger management consisted of a role play, assertive training, education, telephone call coaching and a booklet. The program revealed significantly less Anger-in (Z = -1.997, p = .046), anger-out (Z = -2.207, p = .027). No difference, however, was found in anger control (Z= -1.826, p=.068). Conclusion: This evaluation suggested that more assertive training and longer intervention may be needed to maximize anger control.

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Design of Internet Phon(VoIP) System for Voice Security based on VPN (VPN 기반의 음성 보안을 위한 인터넷 텔레포니(VoIP) 시스템 설계)

  • Kim Suk-Hun;Kim Eun-Soo;Song Jung-Gil
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.10 no.5
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    • pp.942-949
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    • 2006
  • The VoIP(Voice over IP) has been worldwide used and already put to practical use in many fields. However, it is needed to ensure secret of VoIP call in a special situation. It is relatively difficult to eavesdrop the commonly used PSTN in that it is connected with 1:1 circuit. However, it is difficult to ensure the secret of call on Internet because many users can connect to the Internet at the same time. Therefore, this paper suggests a new model of Internet telephone for eavesdrop prevention enabling VoIP(using SIP protocol) to use the VPN protocol and establish the probability of practical use comparing it with Internet telephone.

Study on Design of Internet Phon(VoIP) using the VPN (VPN을 적용한 인터넷 전화 단말기의 설계에 관한 연구)

  • Yoo, Seung-Sun;Kim, Sam-Tek;Lee, Seung-Gi
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.30 no.2A
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    • pp.12-19
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    • 2005
  • The VoIP(Voice over IP) has been worldwide used and already put to practical use in many fields. However, it is needed to ensure secret of VoIP call in a special situation. It is relatively difficult to eavesdrop the commonly used PSTN in that it is connected with 1:1 circuit. However, it is difficult to ensure the secret of call on Internet because many users can connect to the Internet at the same time. Therefore, this paper suggests a new model of Internet telephone for eavesdrop prevention enabling VoIP(using SIP protocol) to use the VPN protocol and establish the probability of practical use comparing it with Internet telephone.

A Characteristics of Temperature of the Local Tissue in the Human Body under Local Exposure of Electromagnetic Wave (전자파(電磁波)에 노출(露出)된 생체(生體)의 국소부위(局所部位)의 온도(溫度) 특성(特性))

  • Park, Ju-Tae
    • Journal of the Korean Society of Industry Convergence
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    • v.5 no.4
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    • pp.321-327
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    • 2002
  • There has been an increase in the public concern about possible health risks by electromagnetic exposure from mobile phones. Recently, increase in the use among young children of portable telephones public concern regarding potential health hazards due to a hot spot appearing inside the infant head, has been growing. Since the biological hazards due to RF exposure are caused mainly by a temperature-rise in tissue, the effect of localized SAR for portable telephones should also be related to the temperature-rise in the human head. In this paper, it was measured that in the actual use of portable telephone the temperature of the local tissue in the human-head change. As a result, it should be noted that the mean temperature of human-body and localized tissue is rising from beginning call. However the temperature variation of localized tissue is recovered rapidly as normal temperature, although the mean temperature of human-body rising continuously at ending call of portable telephone.

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Implementation and Performance Evaluation of B-ISDN Protocol embedded IP-PBX System for Multimedia Communication (B-ISDN 프로토콜 내장의 멀티미디어통신용 IP-PBX 시스템의 구현 및 성능평가)

  • Kwon, Jung-Jang
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.11 no.7
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    • pp.1296-1304
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    • 2007
  • In this paper we researched on the implementation of the B-ISDN protocol embedded IP-PBX System with the computers interconnected by the Internet for the telephone exchange and multimedia communication. For the improvement on the structural problems of the previous PABX we designed the structure of the IP-PBX System, defined message and data structure for call control, designed call control state transition, and implemented call control message flows for user's communication.

Implementation of B-ISDN Protocol embedded IP-PBX System for Multimedia Communication (B-ISDN 프로토콜 내장의 멀티미디어통신용 IP-PBX 시스템 구현)

  • Choi, Jae-Won
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.11 no.12
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    • pp.2256-2264
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    • 2007
  • In this paper we researched on the implementation of the B-ISDN protocol embedded IP-PBX System with the computers interconnected by the Internet for the telephone exchange and multimedia communication. For the improvement on the structural problems of the previous PABX we designed the structure of the IP-PBX System, defined message and data structure for call control, designed call control state transition and implemented call control message flows for user's communication.

The Relations of Emotional Labor to Emotional Exhaustion and Turnover Intention in Call Center Workers (콜센터 근로자의 감정노동과 감정소진 및 이직의도의 관계에 대한 연구)

  • Lee, Soo-Yun;Yang, Hae-Sool
    • The Journal of the Korea Contents Association
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    • v.8 no.4
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    • pp.197-210
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    • 2008
  • In this paper, I show the factors which have an effect on the emotional exhaustion and turnover intention in call center workers who perform emotional labor using telephone without direct confronting with clients. I empirically show that emotional exhaustion decreases job satisfaction and increases turnover intention. Therefore the emotional exhaustion is the important managing factor for efficient management of call center. To weaken emotional exhaustion, it is necessary to decrease time pressure in call center work. To weaken turnover intention, it is important to strengthen superior support. This study makes a contribution in providing the fact that emotional exhaustion is an important managing factor in administration of call center worker.