Partner News, August 7, 2025.

The latest white paper from TCCA looks at how 3GPP broadband mission critical services (MCX) can interwork with the existing narrowband land mobile radio (LMR) networks such as TETRA.

Today’s press release from TCCA identifies areas discussed in the paper as including: “…seamless voice interoperability between LMR and MCX, data service integration, hybrid network support, multimedia feature enhancements for LMR users, standards-based interoperability, and unified control room integration.”

On the longevity of TETRA networks the TCCA paper says “…transitioning from LMR to broadband MCX must follow a phased, carefully managed approach… a hybrid LMR–MCX configuration, particularly for voice communications, represents an effective starting point... The white paper provides a detailed assessment of interworking functionalities and technical requirements, exploring both standardised and proprietary architectural models to connect LMR networks with MCX services. TETRA is presented as a representative case, though the same principles apply to other narrowband technologies such as APCO P25.”

The paper is authored by the TCCA IWF Working Group, so it outlines the current status of the TCCA IWF standard, in addition to coverage on TETRA and 3GPP progress.