Sentinel Plus - System Architecture

Sentinel Plus offers a single scalable system suitable for community alarm receiving centres right up to the largest alarm receiving centres. Systems feature a hot standby capability with the option of an additional hot off-site disaster recovery ability.

Sentinel Plus uses a relational database management system for safe data storage. For excellent transaction throughput, scalability, reliability and low administration requirements we recommend IBM Informix Dynamic Server. We also offer full support for Microsoft SQL Server 2000 if this solution is required by the customer.

Multi-process signalling allows high throughputs: in excess of 100 signals per second can be achieved by Sentinel Plus systems using midrange server systems from vendors such as HP or IBM.

System profiles

Low cost system

• Two duplicated and replicated database servers with front-end processor software for signal handling.

• Operator workstation(s).

• Network serial hubs and spare for communication with serial receiving equipment (may not required if all signalling is IP-based or Red Care).
• Network switch and spare.
• DSL router (or other broadband equipment) with PSTN modem backup for remote support.

Fully featured system

The fully featured system contains all the features from the low cost system but differs in that dedicated machines are used for the database servers and front-end processors. The Sentinel Plus system can take full advantage of high-performance servers and network switches and you can choose a level for hardware and performance suited to your requirements.

In addition the system shown has all the optional modules including Automated Alarm Handler, Web Services, Engineer access, Report Scheduler for automated report generation and firewall suitable for running Web Services over the internet.