The Digital Mobile Radio (DMR) Association has awarded a second interoperability certificate to Tait Communications following formal standardised testing of Tait DMR Tier 3 terminals.
Earlier this year, Tait was awarded the world’s first DMR Tier 3 interoperability certificate for its Tier 3 infrastructure equipment, meaning that organisations could, for the first time, choose a provider with genuine certification.
John Graham, Solutions Marketing Manager, Tait Communications, said: ‘The latest interoperability certification of Tait DMR Tier 3 terminals further underscores our long-held commitment to providing genuine, end-to-end open-standards solutions for our customers.
‘Organisations and personnel who depend on interoperable critical communications to carry out their work safely and efficiently can be assured that Tait DMR Tier 3 equipment is fully interoperable with equally certified equipment from other vendors.’
Tait is committed to open-standards technology and its DMR solution is no exception. Tait DMR is built on the proven MPT 1327 trunking architecture and designed to be fully compliant with the Digital Mobile Radio open standards defined by the European Telecommunications Standards Institute.
Tom Mockridge, chair of the DMR Association Technical Working Group, comments: ‘Announcement of the interoperability tests for both Tier 2 and Tier 3 products demonstrates the commitment of the radio industry to DMR as the digital technology of choice for professional users, and the leading role DMR products are playing in the marketplace.
‘The success of DMR is based on the technology’s strengths of ease of migration from analogue, more effective use of spectrum, efficient use of infrastructure compared to FDMA, and the flexible and innovative features available from a two-slot TDMA approach.’
Digital Mobile Radio (DMR) is a digital radio standard specified for professional mobile radio (PMR) users developed by ETSI. There are three tiers:
DMR Tier I: Unlicensed
• DMR Tier I products are for license-free use in the 446MHz band. Tier I provides for consumer applications and low-power commercial applications.
DMR Tier 2: Conventional DMR
• Tier II covers licensed conventional radio systems, mobiles and hand portables operating in PMR frequency bands from 66-960MHz. DMR Tier II standard is targeted at users who need spectral efficiency, advanced voice features and integrated IP data services in licensed bands for high-power communications.
DMR Tier 3: Trunked
• DMR Tier III covers trunking operations in frequency bands from 66-960MHz. The Tier III standard specifies two-slot TDMA in 12.5kHz channels. Tier III supports voice and short messaging handling similar to MPT-1327 with built-in 128 character status messaging and short messaging with up to 288 bits of data in a variety of formats. It also supports packet data service in a variety of formats, including support for IPv4 and IPv6.