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Proceedings ArticleDOI

A SIP based VoIP application with an enhancement aiding hearing impaired

01 Oct 2008-pp 1-6
TL;DR: This paper envisages an application which can be used by hearing impaired persons and provides answers for all the cases where either one or both the users communicating are hearing impaired.
Abstract: Communication Technology has taken a great leap towards the advancement. The new communication technologies evolving in the world have changed the living style of the man. One of the communication technology which has revolutionized the telecommunication sector is Voice over Internet Protocol (VoIP). The conventional VoIP applications are useful for hearing enabled persons and do not address the solution for hearing impaired. This paper envisages an application which can be used by hearing impaired persons. They communicate using a text interface and make phone calls. The application provides answers for all the cases where either one or both the users communicating are hearing impaired. This enhancement for the existing VoIP solutions would be of great help to hearing impaired people.
References
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Proceedings ArticleDOI
10 May 2004
TL;DR: The issues that need to be considered when deciding whether to implement voice-over-Internet protocol (VoIP) deployment are investigated, including performance, quality of service, reliability and availability, scalability, obsolescence and service life, security and regulatory issues, electricity and backup power, network traffic and bandwidth.
Abstract: This paper investigates the issues that need to be considered when deciding whether to implement voice-over-Internet protocol (VoIP). The first part of the paper focuses on the management issues that concern VoIP deployment, such as performance, quality of service, reliability and availability, scalability, obsolescence and service life, security and regulatory issues, electricity and backup power, network traffic and bandwidth. The second part of the paper covers three case studies on VoIP deployment. The first case is a report on a 90-user VoIP trial by Carnegie Mellon University, followed by a prospective study on the electricity consumption and costs should VoIP be deployed to the entire campus of 6,000 users. The second case concerns the United States Department of Education, which has successfully deployed VoIP for 1,300 users. The final case details the Colorado State University VoIP trial, which has about 50 users.

73 citations


"A SIP based VoIP application with a..." refers background in this paper

  • ...They also offer many advantages over traditional telephony system [1]....

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Journal ArticleDOI
TL;DR: This paper studies the combined effects of bit rate, forward error correction, loss rate, loss distribution, delay and jitter on the perceived conversational quality using the pseudo-subjective quality assessment (PSQA) technique, which allows for accurate, subjective-like assessments in real time if necessary.

58 citations

Proceedings ArticleDOI
01 Jan 2005
TL;DR: The feasibility of open, standard JAIN (Java APIs for integrated networks) SIP APIs, which are originally developed to foster rapid service creation across heterogeneous networks, are demonstrated for the purpose of measuring signaling performance of VoIP.
Abstract: VoIP must offer the same level of performance and reliability as PSTN, if it were to replace the traditional PSTN. An important indicator of the performance of VoIP is the signaling or call set up delay. Most of the prior research efforts concerning the signaling performance consider long distance calls routed over public wide area networks. Due to the many outstanding issues associated with using VoIP over public networks, however, VoIP is considered to be a viable option primarily in the case of corporate intranets and tunnels. When VoIP is used over corporate intranets and tunnels, the influence of factors such as workload of end user devices, and the number of proxies along the routing path may be prominent and this influence needs to be determined. Also, corporate VoIP service is likely to be offered across heterogeneous network infrastructures using solutions from multiple vendors. As a result, it is necessary to be able to measure the signaling performance of VoIP independent of the underlying networking technology and the vendor-specific implementation. In this paper we demonstrate the feasibility of open, standard JAIN (Java APIs for integrated networks) SIP APIs, which are originally developed to foster rapid service creation across heterogeneous networks, for the purpose of measuring signaling performance of VoIP. Since the performance measurement capability is based on open, standard APIs it can be used uniformly for VoIP implementations from multiple vendors operating on heterogeneous network infrastructures. We quantify the impact of workload on end-user devices on the signaling performance of VoIP via extensive experimentation. Our results can be used to estimate the signaling performance for a given level of load prior to deployment of VoIP

29 citations

Journal ArticleDOI
TL;DR: The article explains how JAIN SS7 and IP APIs can be leveraged for the converged SS7-IP networks of the future and describes the JAIN PEG roadmap.
Abstract: JAIN envisions the creation of a number of Java APIs that abstract the details of networks and protocol implementations, and allow for the development of portable applications. The JAIN Protocol Experts Group (PEG) will focus on developing Java APIs for protocols used in telephony, INs, wireless networks, and the Internet. The PEG is organized into an SS7 subgroup and an IP subgroup. The article provides an introduction to PEG. It next describes the JAIN SS7 APIs. It then describes the JAIN IP APIs. The article also explains how JAIN SS7 and IP APIs can be leveraged for the converged SS7-IP networks of the future and describes the JAIN PEG roadmap.

21 citations


"A SIP based VoIP application with a..." refers methods in this paper

  • ...Java API [7] for Integrated Networks (JAIN) SIP is the java API which is used in developing SIP applications....

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  • ...We implemented SIP using this API....

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  • ...Keywords: Voice over IP, SIP, RTP, Jain SIP API, MOS, and Hearing Impaired....

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  • ...JAIN protocol APIs....

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  • ...All these advantages made the protocol to be widely acceptable. b) JAIN SIP API Java API [7] for Integrated Networks (JAIN) SIP is the java API which is used in developing SIP applications....

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Journal ArticleDOI
TL;DR: This paper assesses the impact of active queue management (AQM) on the quality of service of voice over IP (VoIP) and shows that the use of active queues management schemes significantly improve the perceived quality of voice calls, offering adequate user satisfaction.

16 citations


"A SIP based VoIP application with a..." refers background or methods in this paper

  • ...The E-Model provides an objective method of assessing the transmission quality [5] [6] of a telephone connection....

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  • ...The R-factor uniquely determines the Mean Opinion Score (MOS)....

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  • ...Mean Opinion Score (MOS) [5] is used to calculate the end user satisfaction of the VoIP system....

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  • ...58 __________________________________ Figure 3-Equivalent R values to estimate MOS [5] Mean Opinion Score (MOS)...

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  • ...The experiment was carried out with G.711 as the audio codec. a) MOS Results analysis The Mean Opinion Score was around 4.4 and above in both LAN and WLAN which indicates that the system performance was very good and the user satisfaction was higher in both the cases....

    [...]