Across networking communities, discussions about industrial routers keep landing on the same point: a construction site needs one device that can serve "all the cameras and all the engineers with laptops." CCTV needs consistent upstream bandwidth, laptops need Wi-Fi coverage, and inside the electrical cabinet, PLC and sensors are waiting to be reached. The endpoints could hardly be more different, yet there's only one way in—a single SIM card.
A home router usually won't survive the first month here. Sheet-metal site cabins easily reach 60°C+ in summer, site power fluctuates, and surge events from thunderstorms can hit at any time. The device also needs to mount on a DIN rail inside the cabinet—none of this is what a home router was designed for. An industrial-grade cellular router deals with a different set of problems. Here's a four-step approach to planning the network.
Surveillance devices (CCTV, NVR) have the clearest bandwidth demand—one 1080P camera typically streams 2–4 Mbps, so ten cameras mean 20–40 Mbps. That total is the first hard number to base the selection on. Office devices (laptops, phones) connect over Wi-Fi, and their headcount decides coverage requirements. Control devices (PLCs, sensors, meters) send little data each, but they're picky about latency and encryption, so they usually go over wired or serial connections instead of competing with video for wireless airtime.
Ten or more HD cameras, a crew of engineers working online, plus remote video backhaul—that's a 5G job. Fewer endpoints and lighter traffic, and 4G does the job fine.
For 5G cellular router, the USR-G816 is the one to look at: multi-port design, Qualcomm quad-core processor with the X62 5G modem, SA+NSA support across global mainstream bands, and a serial port so PLCs and sensors can hook up directly. It fits sites with lots of devices and heavy bandwidth needs.
For 4G cellular router, the USR-G806w: three Ethernet ports plus boosted Wi-Fi (dual FEMs, 5dBi high-gain antennas), all in a 104×102×28 mm package that clips onto a DIN rail inside the cabinet. It suits compact sites and setups that lean on Wi-Fi coverage. One point from the community discussions is worth repeating: an all-in-one device saves a whole second switch and a mini rack. The G816 with its multiple ports and the G806w with routing and Wi-Fi in one unit both follow that logic.
Mounting: DIN rail or wall mount, so it fits in electrical cabinets and temporary racks. Temperature: the G816 runs from -35°C to 75°C, the G806w from -20°C to 70°C, with the metal housing doing double duty as a heat sink. Power: wide-voltage input, and the G806w offers dual feeds via a 2-pin terminal block and a DC jack, so a primary feed failure can switch over to the backup. Protection: surge/EFT protection handles lightning strikes and switching transients, ESD protection deals with static, and a hardware watchdog keeps the router running 24/7—if the device ever hangs, it restarts itself. On unattended sites, that's what keeps the network alive.
The hidden cost of a temporary network is truck rolls, so remote capabilities need to be complete from day one. VPN: both routers support OpenVPN, IPsec, PPTP, L2TP and GRE; the enhanced OpenVPN client can hold three server connections at once and also act as a server, pulling site devices back into the head office LAN. The G806w imports .ovpn files with one click and works with common server platforms like CloudConnexa, AWS EC2, OPNsense and pfSense, so configuration overhead stays low. Management platform: parameters, reboots and firmware upgrades can all be handled remotely from the office. Alerts: device offline, weak signal and data cap overrun trigger real-time notifications by email or SMS. Nobody watches a screen at a site, so pushing the alert to the project manager's phone is enough. The community said it plainly: DIN-rail mounting plus easy remote management is where the real demand in industrial networking sits.
How many devices can one router handle? There's no fixed answer, but it can be estimated. Take the G806w: three Ethernet ports for an NVR, PLC and time clock, Wi-Fi covering dozens of laptops and phones at once, and three uplinks—cellular, wired, Wi-Fi—that switch over automatically when one fails. The G816 has more ports plus a serial interface, so it can host an even wider mix of devices. What actually caps the headcount is upstream bandwidth and coverage range, not the router's "capacity."
A temporary network comes together in four steps: sort the endpoints, pick 4G or 5G after adding up camera bitrates, install to industrial standards, and set up remote management up front. The same flow applies to construction sites, mobile sites and temporary command centers. When the job wraps up, the cellular router comes off the rail and moves to the next site.
