Now showing items 1-20 of 117

  • Grafting an ATM network onto an existing ethernet network 

    Tucker, William David; Keats, Derek (Telkom, 1998)
    Grafting an ATM network onto an existing Ethernet network is a non-trivial exercise in network configuration. The process of mating ATM technology to an Ethernet network without tampering the underlying backbone and network ...
  • 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 ...
  • A framework and toolkit for the collection and analysis of QoS statistics for voice traffic in Next Generation Networks 

    Paulse, Tania (Telkom, 2000)
    The multi-service, multi-architecture nature of NGNs is so complex that the management of services, in addition to networks, emerges as a research challenge. Despite QoS limitations, VoIP (as opposed to VoATM), dominates ...
  • A framework and toolkit for the collection and analysis of QoS statistics for voice traffic in Next Generation Networks 

    Paulse, Tania M.; Tucker, William David (Telkom, 2000)
    The multi-service, multi-architecture nature of NGNs is so complex that the management of services, in addition to networks, emerges as a research challenge. Despite QoS limitations, VoIP (as opposed to VoATM), dominates ...
  • Fast tracking students from disadvantaged backgrounds into main stream Computer Science 

    Blignaut, Renette; Venter, Isabella M.; Cranfield, D.J. (Computer Society of South Africa, 2000)
    A computer-based training (CBT) system was used to teach Computer Literacy to full-time students at the University of the Western Cape. This approach was successful in creating computer literate students as well as creating ...
  • An Internet paradigm approach to policy-based network management of legacy kit for VoIP services in Next Generation Networks 

    Naidoo, Vaughn; Tucker, William David (Telkom, 2000)
    With QoS available on IP-dominant NGNs, Policy-based Network Management (PBNM) is an effective mechanism for managing services as opposed to actual devices. IP is ubiquitous, and any NGN must contend with legacy devices ...
  • Policy-based network management of legacy equipment in Next Generation Networks 

    Naidoo, Vaughn; Tucker, William David (Telkom, 2001)
    Next Generation Networks use policy-based network management and QoS protocols to provide voice services on IP networks. Large numbers of older equipment still push IP packets. We present several solutions that include ...
  • 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 ...
  • Web-based telephony bridges for the deaf 

    Glaser, Meryl; Tucker, William David (Telkom, 2001)
    A Teldem provides text-based telephony services to the deaf. Despite an array of text-based communications mechanisms on the web, the Teldem is the only means of synchronous telecommunication available to a deaf person. ...
  • Telgo323: an H.323 Bridge for deaf telephony 

    Penton, Jason; Tucker, William David; Glaser, Meryl (Telkom, 2002)
    We have developed a prototype bridge that relays text and speech between Teldem, a text telephone for the Deaf, and a standard telephone or H.323 endpoint. Telgo323 uses modified H.323 media gateways and open source Text ...
  • SoftBridge: an architecture for building IP-based bridges over the digital divide 

    Lewis, John; Tucker, William David; Blake, Edwin H. (Telkom, 2002)
    Users and computing equipment have varying capabilities that include the abilities to exchange text and audio, engage in high bandwidth communication, etc. As the technological options increase, e ective communication ...
  • Handheld fast-track feedback instant messaging 

    Adesemowo, A. Kayode; Tucker, William David (Telkom, 2003)
    As mobile devices and networks become more data-centric, text messaging requires an extension of co-presence capabilities for better interactive discussion between input/output handicapped handheld users and their free ...
  • Floor control arbitration for a hybrid voice/text web-board 

    Benjamin, Anita; Tucker, William David (Telkom, 2003)
    We have built a hybrid voice/text web–board that utilizes floor control for handling resources such as microphone and interface events. The aim of this research is to determine the most appropriate floor control mechanism ...
  • SoftBridge: a multimodal instant messaging bridging system 

    Lewis, John; Tucker, William David; Blake, Edwin H. (Telkom, 2003)
    Instant Messaging is traditionally a text only a air. However, there are instances when it would be useful to bridge to other types of media, like speech. The SoftBridge is an application framework that enables this kind ...
  • Using voice over IP to bridge the digital divide: a critical action research approach 

    Chetty, Marshini; Tucker, William David; Blake, Edwin H. (Telkom, 2003)
    There is a great disparity between those who have access to Information and Communication Technologies (ICTs) and those that do not. This phenomenon forms part of the Digital Divide. Many ICTs may be used to help overcome ...
  • SoftBridge in action: the first Deaf telephony pilot 

    Tucker, William David; Glaser, Meryl; Lewis, John (Telkom, 2003)
    Following on several partial prototypes, we built an automated Deaf Telephony bridging application with the SoftBridge platform. The SoftBridge performs multi-modal bridging in real-time using Text-to-Speech (TTS) and ...
  • Affective gesture feedback Instant Messaging on handhelds 

    Adesemowo, A. Kayode; Tucker, William David (Institute of Electrical and Electronics Engineers, Inc., 2004)
    Mobile devices and mobile networks are becoming more data-centric (evident in Japanese I-mode) even as mobile network voice Average Revenue Per User are declining, new stream of data services are required which must take ...
  • Instant Messaging on handhelds: affective feedback 

    Adesemowo, A. Kayode; Tucker, William David (Telkom, 2004)
    A text only Instant Messaging (IM) built on the IETF open standard SIP/SIMPLE has been developed in line with our proposed introduction of a user-defined text Hotkey feature. These act as an on-click Affective Gesture (AG): ...
  • Developing locally relevant applications for rural areas: a South African example 

    Chetty, Marshini; Tucker, William David; Blake, Edwin H. (SAICSIT, in assocation with ACM, 2004)
    The digital divide between rural and urban areas within developing countries is vast. We investigate how to address this divide by introducing Information and Communication Technologies (ICTs) into remote rural areas. Our ...
  • Bridging communications across the digital divide 

    Blake, Edwin H.; Tucker, William David (CTIT, 2004)
    Connecting people across the Digital Divide is as much a social effort as a technological one. We are developing a community-centered approach to learn how interaction techniques can compensate for poor communication across ...