Appendix A reproduces a paper that was presented by the author at the Southern African Telecommunications, Networks and Applications Conference in September 2002. This paper describes a service that uses the simple object access protocol to provide a means for applications to send messages using the GSM short message service.
This SOAP service is used by the intelligent reporting system described in Section 7.3.3 to send notification of faults to the network administrator.
Guy Antony Halse and George Wells, Rhodes University
Many applications need the ability to do real-time notification when events occur. Often the people who need to be kept aware of events are in a remote location.
This paper looks at a bi-directional gateway between networked computers and the GSM short message service. The gateway is implemented as a web service, and uses the Simple Object Access Protocol to facilitate data communication.
The service interacts with a database in order to facilitate retrieval of sent or received messages, as well as provide accounting abilities.
It is intended as a practical proof-of-concept application demonstrating some of the capabilities of the Simple Object Access Protocol.
Remote notification is a facility that many monitoring and control applications could benefit from. For example, network managers are often interested in being automatically informed of exception conditions that occur on their network. It was just such an application that was the birth of the service described in this paper
With more than eleven million cellular telephone subscribers in South Africa , it seems reasonable to assume that majority of professionals in the country have, or have access to, a cellular phone. With this in mind, the most obvious and effective way to provide notification is to use the cellular networks' short message service (SMS).
The problem, therefore, is to provide a way for computers to interface with the short message service. While discussing the issues involved in doing this, it became quickly apparent that requirements for remote notification such as this extended well beyond the authors' network monitoring application.
Rather than have many people investigating different approaches to the same problem, it was agreed that it would be better to provide a single, unified method of providing remote notification using the cellular network. The final approach adopted was a web service, which will now be discussed in detail.
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