What each technology is good at
The three technologies differ in how they carry voice and what they need to work:
- Analog modulates the carrier directly. Any radio on the same frequency with the same tone setting hears the call. One frequency carries one conversation. It is simple, cheap and robust, and it still works when the signal is weak enough that digital would drop out.
- DMR digitises the voice and uses two-slot TDMA on a 12.5 kHz carrier. One frequency can carry two conversations, and the system can add radio IDs, encryption, text, dispatch and recording. It needs compatible digital radios and, for site coverage, a DMR repeater.
- PoC sends push-to-talk voice over the mobile network. It has no distance limit beyond mobile coverage, works across cities and countries, and can be managed from a platform. It needs SIM cards, data plans and a subscription, and it depends on the mobile network.
None of them is “best” in isolation. The right choice depends on coverage, capacity, privacy, cost and how the team works.
Coverage: site, city or country
Conventional radio coverage is built. A handheld covers a short distance; a repeater on a high antenna extends it; an indoor antenna system fills the concrete and metal areas. The coverage footprint is predictable and under your control, but it stops at the edge of the network.
PoC coverage follows the mobile network. That is an advantage across a city or a country, and a weakness in basements, tunnels, remote sites and large steel buildings. If the mobile network is congested or down, the PoC fleet degrades or stops at the same time.
A practical rule:
- Single site, critical coverage: conventional (analog or DMR) with a repeater.
- Multi-site or mobile fleet: PoC or a converged DMR/PoC terminal.
- Mixed estate: DMR on site, PoC for the road, with a shared talk-group plan.
For the coverage mechanics, see the walkie-talkie range guide.
Capacity: how many groups can talk at once
Capacity is where DMR earns its price. On one 12.5 kHz carrier, DMR provides two time slots, so two talk groups can talk at the same time. Analog provides one conversation per frequency. If a hotel has housekeeping, engineering, security and front desk all active at once, analog needs four frequencies; DMR can do it with two carriers.
PoC capacity is limited by the platform and the mobile network, not by the radio channel. In practice, a PoC platform can host many talk groups, but the user experience depends on network latency and the platform’s architecture.
Capacity planning is not just “how many groups”. It is also:
- how many users are on each group;
- how often they talk;
- whether the group needs a dispatcher;
- whether calls must be recorded;
- whether one group must override another in an emergency.
Write the talk-group plan before comparing hardware. A system that covers the site but cannot separate the departments will fail the operation.
Privacy and encryption
Analog privacy codes (CTCSS/DCS) are not encryption. They stop you from hearing other users on the same channel; they do not stop others from hearing you. Anyone with a compatible radio and the right tone can listen.
DMR supports basic privacy and, on many professional models, AES256 encryption. Encryption is a feature that must be ordered, keyed and managed. It also has legal implications in some countries, so confirm the rules before relying on it.
PoC encrypts traffic over the mobile network and the platform, but the security model is different: it depends on the platform operator, the SIM and the device. For sensitive operations, ask for the platform’s encryption and data-residency details, not just “it runs over LTE”.
Battery, audio and ruggedness
A conventional handheld transmits only when the user presses PTT, and a DMR radio transmits only in its own time slot, which can extend battery life. PoC radios maintain a data connection to the platform, so standby and network behaviour affect battery life differently.
Audio is a safety issue in noisy sites. Look for noise-cancelling microphones, loud speakers and accessories that match the environment: speaker microphones for gate and yard staff, noise-attenuating headsets for plant rooms, discreet earpieces for hotel front-of-house.
Ruggedness is not a single IP number. Check the sealing of the accessory covers, the battery fit, the drop rating and the temperature range. A radio that is IP68 but has a loose accessory cover will still fail in a wet environment.
Five-year cost: hardware vs subscription
The cost comparison has to cover the whole term:
| Cost element | Analog | DMR | PoC |
|---|---|---|---|
| Handheld hardware | Low | Medium | Low–medium |
| Repeater / infrastructure | Medium | Medium–high | None on site |
| Licence | Required for business bands | Required for business bands | No frequency licence; SIM/data plan |
| Installation | Low–medium | Medium | Low |
| Recurring cost | None per user | None per user | Subscription per user, every month |
| Dispatch / recording | Limited or third-party | Integrated | Platform-dependent |
| Coverage expansion | New site or antenna | New site or antenna | Mobile coverage |
For a 40-user hotel, a DMR system may cost more upfront but carry no per-user fee. For a 200-user seasonal event, PoC may be cheaper because the subscription can be switched off after the event. Compare the five-year total for your own headcount, not a generic per-radio price.
Decision table by scenario
| Scenario | First choice | Why |
|---|---|---|
| Small shop, café, guesthouse | Analog or PMR446 | Low cost, simple coordination, no system |
| Hotel with departments and basement | DMR + repeater + indoor antennas | Talk groups, privacy, coverage |
| Warehouse with racking | DMR + repeater + aisle coverage | Metal environment, group separation |
| Construction site, temporary | Analog or DMR portable repeater | Rugged, quick to deploy, no fixed infrastructure |
| Multi-city fleet | PoC or converged DMR/PoC | Distance, central dispatch, no radio sites |
| Event with hundreds of radios | DMR rental or PoC pool | Temporary capacity, talk groups, charging logistics |
| Industrial plant with hazardous areas | DMR with certified terminals | Safety, encryption, integration |
The table is a starting point, not a design. A site survey and a talk-group plan can move a project from one row to another.
Can you mix technologies?
Yes, and most large estates do. Three common patterns:
- DMR on site, PoC on the road. A converged terminal or a gateway bridges the two, so a driver can reach the site talk group and the control room can reach the driver.
- Analog legacy, DMR new. Digital repeaters and terminals work in analog, digital and mixed mode, so the old fleet stays on air while new departments move to digital.
- Conventional core, PoC overlay for events. The permanent system covers the building; a PoC pool covers a temporary site or a surge in headcount.
The key is to define which talk groups live on which system and how they bridge. A mixed fleet without a group plan is two separate systems, not one network.
For the licensing side, read walkie-talkie licence. For a first-pass coverage recommendation, use the coverage planner. If you want to compare specific models, start with the digital radios, analog radios and PoC radios catalogues.