Julius, Elroy P.Tucker, William David2013-01-232013-01-232005Julius, E. P. & Tucker, W. D. (2005). Guaranteed delivery of semi-synchronous IP-based communication. In D. Browne (ed.), Southern African Telecommunication Networks and Applications Conference (SATNAC), Vol. 1, pp. 407–412, Drakensberg, South Africa0-620-34907-7http://hdl.handle.net/10566/509This paper presents an empirical solution for guaranteeing the delivery of synchronous and asynchronous messages within a semi-synchronous IPbased communication domain. The communication infrastructure that is needed between Deaf and hearing communities forms the application domain within which the research is situated. SoftBridging is a framework for multi-modal bridging as well as multi-user, multi-modal conversation sessions. An implementation of this concept called SoftBridge for Instant Messaging Bridging Application (SIMBA), is a communication platform that allows a hearing and Deaf person to communicate inside a single uniform space. The system makes use of various web services to do the actual data conversions such as voice to text and text to voice. Publish-subscribe systems are an emerging paradigm for building a range of distributed applications. The architecture of publishsubscribe systems make use of Message Oriented Middleware (MOM) to guarantee reliable delivery of messages within a communication domain. We have incorporated a publish-subscribe system within the overall architecture of SIMBA. We have thus modified the existing architecture of SIMBA to reliably transport semi-synchronous data over a synchronous established session. We have chosen to use the Session Initiation Protocol (SIP) for the establishment of a synchronous session between various users and SIMBA. The system is currently being used as a basis for developing a Deaf telephony application that guarantees the delivery of messages no matter the synchrony.enCopyright Telkom. This file may be freely used for educational purposes, as long as it is not altered in any way. Acknowledgement of the authors and the source is required.Asynchronous call handlingDeaf telephonyPublish-subscribe systemsSoft bridgingSynchronous call handlingArticle