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TN9400 Trunked Core Network

Tait P25 TN9400 trunked networks are IP-based digital systems specifically designed to provide P25 open standards compliant mission-critical communications over wide geographic areas. Our trunked networks are extremely resilient, with multiple levels of redundancy for reliable communications. For those seeking a single supplier for system supply and support, we can provide you with complete network maintenance and enhancement.

Why choose a TN9400 Trunked Core Network?


Flexible, cost-saving design

The TN9400 offers both P25 Phase 1 trunked and trunked simulcast operation, and supports P25 Phase 2 operation (with the TB9400). The trunked Analog Gateway (TAG) enables connection to legacy analog consoles. This provides a cost-effective infrastructure to meet your communication and operational needs now and in the future.


Cost-effective flexibility

The TN9400 supports remote management for greater operational efficiency. Data transmission is supported over a standards based IP data pipe. Maximum site spacing with Linear Simulcast Modulation (LSM) (used with the TB9400).


P25 standards compliant

The TN9400 follows the P25 open standards compliance, and allows expansion via P25 open standard interfaces: CSSI and ISSI.


Dependable, secure reliability

The TN9400 offers high availability for ensured continuity of network operation in case of server failure. It also supports end-to-end encryption for secure transmissions.

Technical specifications

Modes of operation

Phase 1: P25 Phase 1, P25 Phase 1 trunked simulcast, P25 Phase 1 trunked LSM
Phase 2: P25 Phase 2 trunked, P25 Phase 2 simulcast

Interfaces supported

Phase 1: CSSI, ISSI, Trunked Analog Gateway (TAG)
Phase 2: CSSI

Fault tolerance

High Availability failover from primary to secondary server for hardware, software, and network failure. Disaster recovery node handover - manual activation. Isolated site (network failure). Switch to single site trunking at that site. Backup control channel. (Base station failure). Control channel allocated to a different base station.

Total number of radios supported


Number of sites/channels per site

Phase 1: Up to 28 physical sites distributed over up to 20 logical sites / 23 traffic channels per site, plus control channel
Phase 2: Up to 28 physical sites distributed over up to 20 logical sites / 12 traffic channels, with P25 Phase 1 control channel

Subscriber management

Add/remove single/multiple subscribers. Customize call type permissions. Add/remove multiple talk groups and add an announcement call group/system call group

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