In-House Monitoring
Some large-scale security companies monitor their installed alarm systems. They have a number of monitoring centres spread all over the country. Generally, they work with a central office in a main city with further divisional centres in other cities. However, in remote locations they delegate their monitoring functions to third party. The reason for providing additional monitoring service is customer conveyance and satisfaction.

Third Party Monitoring
There are certain organisations that solely provide monitoring service. They are key players in alarm monitoring in Sydney. They do not manufacture alarms. Since, they provide expertise service in monitoring they have a central office in every possible city. Every centre has a different staff with their own monitoring specialist and requisite tools. Their prime aim is providing alarm-monitoring services.