Migrating
Migrating from Conventional to Trunking
Here are some factors to consider, if you are contemplating migrating from your conventional system to a trunking system:
User density-- Motorola has found through experience that for a system with a density of 75 radios per channel, either trunking or advanced conventional systems may provide improved system control and flexibility. For greater user densities, trunking is the solution of choice.
Level of interference-- if there is a need to reduce the amount of interference currently experienced in a conventional system, trunking is a desirable alternative because its exclusive-use frequencies eliminate co-channel interference.
Enhanced signaling features-- some users may require enhanced signaling features, such as call alert, emergency alert, unit ID, and selective radio inhibit. In this case, either an advanced conventional or trunked system could provide the solution.
Enhanced system operation requirements-- certain system enhancements are available only from trunked systems. For example, average waiting times for a channel are reduced and system reliability is higher. Trunking also offers ease of use when roaming, primarily of conversations within talkgroup(s) and communicating with only one specified user, plus dynamic regrouping of radios.
Other valuable tools exclusive to trunking include: priority levels, out-of-range indication, busy system retries, enhanced system diagnostics, and highest priority for emergency calls during busy conditions. If a user considers most or all of these features to be necessary, then trunking probably is the right choice.
Migrating from Analog to Digital
Motorola’s ASTRO technology is designed to simplify the migration from analog to digital technology, providing you with several migration options.
Backward Compatibility and Interoperability--ASTRO radios are designed to be extremely flexible and operate in analog and digital voice modes. They also operate on narrowband and wideband channels as well as conventional and trunked systems.
Radio by Radio--You can purchase digital radios today and they will operate on your existing analog system. This allows you to maintain current system service while laying the groundwork for a future shift to digital.
Channel by channel--In multi-channel systems, you can convert just one channel at a time. Existing analog radios can operate on analog channels while new digital radios operate on both new digital and existing analog channels.
Region by region--If your system includes multiple cities or geographic regions, you can convert one region at a time to digital. Digital radios can operate throughout the entire system, by using analog to+B61 talk to regions with only analog.
