This calculator provides network administrators with a convenient planning tool to consider network peak performance and contractual issues. The model behind this calculator uses the Erlang C calculation to determine the probability that a set of messages will be delivered to the end consumer within a certain threshold time period and at a certain contractual percentage confidence.  The underlying mathematical distribution assumes that the arrival rate of messages follows a Poisson distribution.  With emergency services networks, the real arrival rates in practice are more extreme than the Poisson model, as the messages are often triggered by extreme, sudden and cataclysmic events.  As such, the forecasts below for contractual performance should be taken as approximations only, and in extreme events (which are often the events for which emergency services networks are designed), will deliver outcomes that could be significantly worse than this theoretical model.

Nevertheless the model demonstrates the significant advantages of the simulcast network model, and also the key performance role played by paging terminals and devices that can support multiple concurrent network transmission channels.

Infostream has more sophisticated modelling and analytical techniques to model real world queuing scenarios, and can provide these as part of its network planning and advisory services.

{Please note that at present this calculator works on Firefox, Chrome, Internet Explorer (7 and higher versions) and Safari browsers only. We anticipate extending to Opera in the near future}

Network Performance