Tacoma Integrates ESChat PTT into P25 Network via ISSI
Tuesday, February 12, 2019 | Comments

The city of Tacoma, Washington, awarded a multiyear contract for broadband push-to-talk (PTT) service to ESChat. The contract includes integration with the city’s existing Motorola Solutions Project 25 (P25) public-safety radio network.

Integration of the ESChat and Motorola systems was performed using the P25 Inter RF Subsystem Interface (ISSI) standard and provides end-to-end encrypted communications between all users. The implementation represents an option for LMR to Long Term Evolution (LTE) integration and is among the first of its kind in commercial service.

ESChat recently announced general availability of P25 Phase 2 support over ISSI availability of dynamic encryption re-keying via the P25 Key Management Facility (KMF). Both of these features are included in the Tacoma contract.

The award follows a 2017 request for proposals (RFP), along with post-vendor selection validation testing. The delay between selection and award included a scheduled software update to the city’s P25 network and validation of that update with the ESChat system. Implementation of the ESChat system and P25 ISSI integration to the Tacoma’s radio network was completed earlier this month.

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