Now showing items 1-6 of 6

  • Automatic voice relay with open source Kiara 

    Yi, Long; Tucker, William David (Telkom, 2009)
    One way for Deaf people to communicate with hearing people over the telephone is to use a voice relay. The service is often provided with a human relay operator that relays text into voice, and vice versa, on behalf of the ...
  • Internet protocol-based push to talk 

    Kobo, Hlabishi Isaac; Tucker, William David; Norman, Michael (Telkom, 2010)
    This paper discusses a way of offering voice instant messaging based on Internet Protocol using Session Initiation Protocol. The purpose of this investigation is to enhance the modern social communication amongst the people ...
  • An interoperable signaling solution between SIP and H.323 

    Jeffries, Michael; Tucker, William David (Telkom, 2001)
    The Session Initiation Protocol and H.323 dominate the Voice over IP world. These signaling protocols are responsible for call setup and call tear down by IP telephony solutions. This project analyses and discusses the ...
  • An Interoperable signaling solution for IP-based Next Generation Networks 

    Jeffries, Michael; Tucker, William David (Telkom, 2000)
    Current VoIP signaling protocols are interoperable with the PSTN SS7 via H.323-to-SS7 or SIP-to-SS7 gateways. As we move toward the Next Generation Network, the PSTN falls away and we work toward carrier-grade VoIP ...
  • Kiara: an open source SIP system to support Deaf telephony 

    Yi, Long; Tucker, William David (Telkom, 2008)
    This paper describes Kiara, an open source SIPbased communication system that provides the building blocks to enable Deaf relay services. We have implemented a prototype that provides real-time text, voice and video to a ...
  • SIP presence location service 

    Wu, Wilson; Radovanovic, Aleksandar; Tucker, William David (Telkom, 2005)
    This paper presents an innovative use of the Session Initiation Protocol (SIP) for the subscription and notification of geographic information in order to provide a privacy concerned location-based service. SIP is a signaling ...