The Intercom System is a Safety Related /Critical System that provides a voice communications between two or more fixed locations within the plant site with selective calling of individual Intercom stations without the call setup dialling/ringing delays that are usual for standard switched telephone calls. They can also be used for long duration open connections. Intercom System allows selective calling of individual Intercom stations, or group calling.

For the Intercom simple operation calling /point-point voice communication shall typically be from the Control Room to key locations around the site such as the Equipment rooms, Fire stations, Assembly points and also Guard House to Gate locations.

TASHKOO Proposed Intercom systems are both analogue and also based on VoIP technology using a dedicated LAN infrastructure. Each Intercom System comprises of central equipment, central control unit and Intercom stations in forms of consoles and outdoor call stations.

The central unit is microprocessor controlled switch with the capacity of multiple intercom stations with both full duplex hands free speech and push to talk simplex. The central control unit for VoIP type also include network interface card. (A)