Tait TN9400

For state, regional, and large county public safety agencies, the network controller is the most critical single component in the entire radio system. A controller failure during an active incident is not a degraded-service event. It is a complete loss of coordinated communications at the worst possible moment. The architecture of the controller determines whether the agency can sustain operations through hardware failures, software faults, and connectivity outages.

The TN9400 is an IP-based P25 trunked network controller supporting up to 250 sites and 200,000 radios, with up to 10,000 radios per site. Channel capacity per site is up to 25 physical channels in Phase 1 (24 traffic plus 1 control) and up to 13 physical channels in Phase 2 (12 traffic plus 1 control). It supports P25 Phase 1 and Phase 2 Trunking, Trunked Simulcast with LSM, and both CSSI and ISSI interfaces for inter-system connectivity. High Availability failover provides automatic handover from primary to secondary server on hardware, software, or network failures. Disaster recovery node support extends availability across regional failures.

Isolated site operation allows individual sites to maintain single-site trunking independently if backhaul connectivity to the core is lost, preventing a wide-area outage from silencing individual sites. Backup control channel allocation automatically reassigns control functions to alternate base stations if a primary base station fails. The Trunked Analog Gateway (TAG) integrates legacy analog dispatch consoles into the P25 network without console replacement. The TN9400 pairs with the TB9400 base station as a complete Tait P25 trunked network solution.