Motorola MTP3500 — New-Gen TETRA Mainstream: Class 3L 1.8W Adaptive Output, 2.0-Inch Colour Display, Integrated Wi-Fi OTA Provisioning, GPS, TEA End-to-End Encryption, IP67 + MIL-STD-810G and 2,100mAh for 19 Hours at 310g
The TETRA side of the decision, and the radio that makes a TETRA estate affordable to extend rather than replace. Class 3L adaptive output at 1.8W is the TETRA power class itself rather than a budget compromise, and the 2.0-inch colour display carries the channel and talkgroup information a trunked network needs. What separates it from the older TETRA generation is provisioning: integrated Wi-Fi OTA programming and firmware updates mean radios are upgraded over the air with no docking dependency, which is the single largest operational cost in a large TETRA fleet. GPS tracking, TEA end-to-end encryption at air-interface class 3, IP67 sealing with MIL-STD-810G testing behind it, and a 2,100mAh pack rated at 19 hours round out a body that weighs 310g. It also sits deliberately between two stable references in this site’s own TETRA coverage: a step up from the compact voice-first MTP3100, and a step below the full-trunking MTP3550 — which is what makes it the mainstream rung of that programme rather than a niche model.
Hytera HP785 — Commercial DMR Flagship: 1,024 Channels, 2.4-Inch Display, 1.5W Speaker with Dual-Mic AI Noise Suppression, IP68 Continuous Submersion, GPS/GLONASS/BeiDou + Bluetooth 4.0 and 24 Hours at 265g
The DMR answer, and the flagship of Hytera’s commercial line. 1,024 channels is the headline number: thirty-two times the codeplug of a Motorola entry portable, which matters to organisations running large talkgroup plans or one shared fleet across several sites. The 2.4-inch display and the 1.5W speaker with dual-mic AI noise suppression attack the same problem from the other direction — speech intelligibility in high-noise environments such as plant floors, ports and mine haul roads. Ruggedness is where it separates furthest from a TETRA mid-tier portable: IP68 continuous-submersion sealing rather than splash-and-immersion, on a chassis that is 45g lighter at 265g. Location and wireless coverage are tri-constellation, GPS with GLONASS and BeiDou alongside Bluetooth 4.0, and the network layer underneath is DMR Tier II dual-slot TDMA. The trade it asks the buyer to accept is protocol: this is a superb DMR portable, and it is only useful to a fleet that is on DMR.
| Specification | Motorola MTP3500 | Hytera HP785 |
|---|---|---|
| Protocol | TETRA | DMR Tier II dual-slot TDMA |
| Positioning | New-gen TETRA mainstream | Hytera commercial DMR flagship |
| Display / Interface | 2.0-inch colour display | 2.4-inch display |
| Battery / Runtime | 2,100mAh Li-Ion — 19 hours | 24-hour rated battery |
| Ingress / Ruggedness | IP67 + MIL-STD-810G | IP68 continuous-submersion |
| Weight | 310g | 265g — 45g lighter |
| Location & Wireless | GPS tracking | GPS/GLONASS/BeiDou + Bluetooth 4.0 |
| Fleet fit | TETRA programme sibling of the MTP3100 and MTP3550 | Standalone Hytera fleet |
Every figure in this table is already published in this site’s own MTP3500 and HP785 sections listed in the data-source line below. No value here is estimated, and this block states no specification that does not already appear elsewhere on RadioSysHub.
The Protocol Split, Not the Spec Sheet
Both radios are professional portables with 19-to-24-hour batteries and IP67 or IP68 sealing, so this is not a spec-sheet argument — it is a protocol argument, and protocol is decided by the network the fleet already runs. Specify the MTP3500 when the estate is TETRA: Class 3L 1.8W adaptive output, a 2.0-inch colour display, integrated Wi-Fi OTA programming and firmware updates with no docking dependency, GPS tracking, TEA end-to-end encryption at air-interface class 3, IP67 with MIL-STD-810G, and 19 hours on a 2,100mAh pack. It is the mainstream rung between the compact voice-first MTP3100 and the full-trunking MTP3550, so accessories, programming and training are already in place across that family. Specify the HP785 when the estate is DMR and the requirement is capacity and clarity: 1,024 channels for large talkgroup plans, a 2.4-inch display, a 1.5W speaker with dual-mic AI noise suppression, tri-constellation GPS with Bluetooth 4.0, DMR Tier II dual-slot TDMA, and IP68 continuous-submersion sealing at 265g. The trade is explicit: the MTP3500 buys into a trunked TETRA estate and its radio-management toolchain, while the HP785 buys channel headroom, 45g less weight and the deeper submersible rating on a DMR network. Neither is better in the abstract — pick the network first, then the radio.
