4G PoE Router: Power and Connectivity Guide

What is a 4G PoE router?

A 4G PoE router combines two functions in a single unit. It provides cellular broadband connectivity over a 4G LTE mobile network, and it supplies Power over Ethernet (PoE) to connected devices through its LAN ports. One device replaces what would otherwise be a cellular router, a PoE injector, and in many cases a small network switch.

The practical consequence is straightforward. Instead of running a separate mains power cable to each IP camera, wireless access point, or VoIP phone, a single Cat5e or Cat6 cable carries both data and power from the router to the device. For installations in locations where mains power is limited, expensive to extend, or simply not present – remote gatehouse cabinets, outdoor enclosures, welfare cabins, pole-mounted housings, temporary compounds – this makes a significant difference to installation time, cost, and physical complexity.

This guide covers how 4G PoE routers work, what they are used for, which products are available on Router Store, and the one thing buyers frequently overlook before they order.

How Power over Ethernet works

Power over Ethernet delivers DC power alongside network data over standard Cat5e or Cat6 Ethernet cable. Two standards define the power levels available.

IEEE 802.3af (PoE) delivers up to 15.4W per port at the power source, with approximately 12.95W available at the connected device after cable losses. This covers most IP cameras, VoIP phones, basic wireless access points, and environmental sensors.

IEEE 802.3at (PoE+) delivers up to 30W per port at the power source, with approximately 25.5W available at the device. This covers higher-powered IP cameras, pan-tilt-zoom (PTZ) cameras, dual-radio access points, and small displays.

Both standards operate on standard Ethernet cable up to 100 metres. No special cable is required. The powered device (PD) and the power sourcing equipment (PSE) negotiate automatically – a non-PoE device connected to a PoE port will not be damaged.

A 4G PoE router acts as the PSE. Its LAN ports supply both data from the cellular connection and power from the router’s own DC supply to whatever is connected.

The 48V supply requirement – what the spec sheet often does not make clear

This is the detail that catches buyers out most often.

Many 4G routers with PoE output are sold without the 48V DC power supply included as standard. The router accepts a wide DC input range – typically 9-48V – but PoE output requires the supply voltage to be high enough to drive the standard correctly. PoE and PoE+ operate nominally at 48V DC. If the router is powered at 12V or 24V from a standard DC adapter, the PoE output ports may not activate, may operate outside spec, or may deliver insufficient power to connected devices.

For Milesight UR32-series routers with PoE output, the 48V DC supply is a separate purchase. Router Store stocks the Milesight 48V DC UK plug adapter specifically for this purpose. It carries 2kV surge protection and connects via an industrial terminal connector. If you are ordering a Milesight UR32-P variant and intend to use the PoE output, add this to the order. Without it, the PoE ports will not function as intended.

The Milesight UR75-504AE-P-W2 (5G, PoE) ships with a 48V adapter included. The Teltonika RUT951 PoE+ ships with its own dedicated PSU. The Milesight UR32-series PoE variants do not include the 48V supply – it must be ordered separately.

Applications: where 4G PoE routers are used

CCTV and remote video surveillance

This is the most common deployment scenario. An IP camera requires both a network connection for video transmission and a power source. In locations where mains infrastructure is absent – a remote field gate, a construction compound perimeter, a rural car park, a temporary event security position – running a separate power cable to each camera is expensive and disruptive.

A 4G PoE router placed in a weatherproof enclosure at or near the camera position connects to the mobile network for backhaul and powers the camera directly over the Ethernet cable. A single installation point, a single cable run to the camera, and remote viewing is operational.

Multiple cameras can be served by a single router if the PoE port count and power budget allow. The RUT951 PoE+ supports three PoE+ output ports at 30W each (90W total). The Milesight UR75-P supports four PoE PSE ports at a combined 60W.

Welfare cabins and temporary site offices

A welfare cabin or temporary site office needs internet access and often needs to support PoE access points or VoIP phones without a separate switch. A single 4G PoE router handles all three: cellular backhaul, Wi-Fi for occupants, and PoE power for any wired access points or desk phones. Installation is a single power connection to the router and Ethernet runs to the devices it serves.

Outdoor access points

Outdoor Wi-Fi access points such as Ubiquiti UniFi or similar require PoE. Connecting an access point to a 4G PoE router with a cable run eliminates the need for a PoE injector or switch at the access point end. For sites covering large outdoor areas – event venues, car parks, industrial yards, caravan and holiday parks – this simplifies the installation considerably.

Remote monitoring enclosures

Environmental sensors, water level monitors, weather stations, and telemetry devices are often deployed in remote field locations. Some of these devices are PoE-powered. A 4G PoE router inside a pole-mounted or wall-mounted GRP enclosure provides both cellular backhaul and device power from a single 48V DC supply, which can itself be fed from a solar-charged battery system if mains power is unavailable.

Access control and gate systems

Access control panels, ANPR cameras, and electronic gate controllers are commonly PoE-powered. In locations where the gate or barrier is away from a building with mains supply, a 4G PoE router in a nearby cabinet provides both the network connection for access control management and power to the PoE devices at the gate.

VoIP and IP telephony

IP desk phones and analogue telephone adapters are typically PoE devices. For a temporary office, a construction site portakabin, or a remote kiosk that needs a business phone number, a 4G PoE router replaces a broadband connection, a PoE injector, and a switch with a single unit connected to a 48V supply.

Holiday parks, caravan sites, and leisure venues

Reception buildings and outbuildings at holiday parks and caravan sites frequently lack structured cabling. A 4G PoE router provides internet access and powers the access point serving guests in that area, without requiring new cable infrastructure from the main building.

Retail and vending kiosk deployments

Kiosks, vending machines, and retail pop-ups that include a screen or camera typically need PoE for the display or camera and cellular for connectivity. A compact 4G PoE router fits inside the kiosk cabinet and handles both.

4G PoE routers available on Router Store

The products below cover the range from compact single-port PoE to high-capacity multi-port deployments.

Teltonika RUT951 PoE+ – the high-capacity 4G option

The RUT951 PoE+ is the most capable 4G PoE router on Router Store by total PoE power budget. Three PoE+ output ports (LAN2, LAN3, WAN) each deliver up to 30W, with a combined budget of 90W. That covers three high-power PTZ cameras, or a mix of standard cameras and a PoE access point, from a single router.

The RUT951 PoE+ also supports PoE input on LAN1, meaning the router itself can be powered from a PoE source rather than a DC adapter. In a cabinet that already has a PoE-capable switch, no separate DC supply is needed for the router.

Cellular performance is 4G LTE Cat 4 at 150 Mbps download and 50 Mbps upload. Dual SIM slots with automatic failover keep the connection live if one network drops. An eSIM is also supported, allowing a software-provisioned carrier profile alongside a physical SIM. Wi-Fi is 802.11b/g/n (2.4 GHz).

The operating range is -40°C to +75°C. RutOS firmware provides WireGuard, OpenVPN, and IPsec VPN. Teltonika RMS integration covers remote configuration, monitoring, and firmware management across fleets. The dedicated UK mains PSU (PR313UK3, 130W) is required and available separately on Router Store.

3x PoE+ output ports at 30W each – 90W total budget
1x PoE+ input port – can be powered from an upstream PoE source
4G LTE Cat 4 – 150 Mbps down / 50 Mbps up
Dual SIM + eSIM with automatic failover
WireGuard, OpenVPN, IPsec VPN
Teltonika RMS fleet management
-40°C to +75°C operating range

View the Teltonika RUT951 PoE+ on Router Store

Milesight UR32 Pro with PoE – dual SIM, serial, and I/O

The Milesight UR32-L0GEU-P-W-485 is the PoE-equipped variant of the UR32 Pro Series. It adds 802.3af/at PoE PSE output on the LAN port to a platform that already includes dual SIM failover, RS232/RS485 serial with Modbus gateway support, galvanically isolated DI/DO, 2.4 GHz Wi-Fi, and two Ethernet ports.

For deployments that need both PoE device power and direct serial instrument integration – a camera alongside a Modbus energy meter, or an access point alongside a pulse-counting flow meter – the UR32-P-W-485 handles both without additional converters or gateways.

The 9-48V DC input range covers standard industrial supplies. Note: 48V DC input is required to activate PoE output. The Milesight 48V DC UK adapter is not included and must be ordered separately.

Operating range is -40°C to +70°C. IP30 metal housing. DIN rail and wall mount included. 3-year manufacturer warranty. Milesight DeviceHub and MilesightVPN for remote management.

PoE PSE output on LAN port – 802.3af/at compliant
Dual SIM failover
RS232/RS485 serial with Modbus TCP/RTU gateway
Galvanically isolated DI/DO
2.4 GHz Wi-Fi included
9-48V DC input, -40°C to +70°C, IP30
48V DC supply required for PoE output – not included

View the Milesight UR32 Pro with PoE on Router Store

Milesight UR32L with PoE – compact single-SIM option

The Milesight UR32L-L0GEU-P is the compact entry point in the Milesight PoE router range. It provides 802.3af/at PoE PSE output across both LAN ports, 4G LTE Cat 4 cellular, and a single SIM slot in a minimal DIN rail enclosure.

For straightforward deployments – a single IP camera with cellular backhaul, a PoE access point at a remote location – the UR32L-P delivers PoE output and connectivity without the overhead of serial ports, I/O, or dual SIM. It is the right choice when the application is simple and the installation budget is tight.

The same 48V DC supply requirement applies. The Milesight 48V DC UK adapter must be ordered separately to activate PoE output.

PoE PSE on both LAN ports – 802.3af/at compliant
4G LTE Cat 4
Single SIM slot
Compact DIN rail form factor
9-48V DC input, -40°C to +70°C
48V DC supply required for PoE output – not included

View the Milesight UR32L with PoE on Router Store

Milesight UR75 PoE – 5G with four-port PoE output

If the site has 5G coverage, the Milesight UR75-504AE-P-W2 steps up from 4G to 5G while keeping the same PoE output capability. Four 802.3af/at PoE LAN ports with a combined 60W budget, dual SIM failover, Wi-Fi 6, RS232/RS485 serial, GPS, and the same quad-core ARM Cortex-A55 platform as the rest of the Milesight Ultra Series.

The UR75-P ships with a 48V DC power adapter included. It is the correct choice for sites where 5G coverage is available and the deployment needs to power multiple cameras or access points alongside fast cellular backhaul.

View the Milesight UR75-504AE-P-W2 on Router Store

The 48V power supply – ordering it correctly

To be direct about this, because it generates support calls: if you are ordering a Milesight UR32 or UR32L PoE variant and you intend to power devices through the PoE ports, you must also order the Milesight 48V DC UK plug adapter. It is not bundled with the router.

The adapter provides a 48V DC output on an industrial terminal connector, with 2kV surge protection. It connects directly to the router’s power input terminal. Plug it into a UK mains socket, connect the terminal to the router, and the PoE ports become active.

For the Teltonika RUT951 PoE+, a 130W UK mains PSU (PR313UK3) is the correct supply and is available separately. For the Milesight UR75-P, the 48V adapter is included in the box.

If you are powering a Milesight UR32-P from a DC source – a UPS battery, a solar charge controller output, or an industrial 48V bus – the router’s 9-48V DC input range is compatible. No additional adapter is needed in that case, provided the source delivers 48V.

Comparing 4G PoE routers: which one is right?

Model	Cellular	PoE ports	Total PoE budget	Dual SIM	Serial	48V PSU included
Teltonika RUT951 PoE+	4G Cat 4	3x PoE+ out + 1x PoE in	90W	Yes + eSIM	No	No – separate purchase
Milesight UR32 Pro PoE	4G Cat 4	1x PoE PSE	~30W	Yes	RS232/RS485	No – separate purchase
Milesight UR32L PoE	4G Cat 4	2x PoE PSE	~30W each	No	No	No – separate purchase
Milesight UR75-P (5G)	5G Sub-6	4x PoE PSE	60W combined	Yes	RS232/RS485	Yes – included

PoE budget planning – how to work out what you need

Matching the router’s PoE budget to the devices it will power is a straightforward calculation, but it needs doing before ordering.

Check the PoE power consumption of each device you intend to connect. This is listed in the device’s datasheet as the PD power draw or PoE class. Common values:

Standard IP dome or bullet camera: 5-10W
PTZ camera: 15-25W
Single-radio Wi-Fi access point: 5-10W
Dual-radio Wi-Fi access point: 15-22W
VoIP desk phone: 3-6W
Outdoor Wi-Fi access point (802.3at): up to 25W

Add the draw figures for all devices you plan to connect and confirm the total sits within the router’s combined PoE budget with some headroom. A router with a 90W budget supplying three cameras at 9W each draws 27W – comfortable. The same router powering three PTZ cameras at 25W each draws 75W – workable but close to the limit. Adding a fourth device at that draw would exceed the budget.

If the required budget exceeds a single router’s PoE output, add a PoE switch on one of the LAN ports. The switch provides additional PoE ports with its own mains supply, while the router continues to serve as the cellular WAN device.

SIM cards for 4G PoE deployments

The SIM card choice for a 4G PoE installation follows the same logic as any cellular deployment, with one consideration that applies specifically to CCTV and remote access.

If the CCTV system uses a remote viewing platform such as Milesight DeviceHub, MilesightVPN, Teltonika RMS, or a cloud NVR service, the platform handles remote access through an outbound tunnel and no static IP SIM is required. This is the straightforward option for most deployments.

If the system needs direct inbound access to the router or NVR – for example, connecting a VMS client directly to the NVR’s IP address – a fixed IP SIM assigns a permanent public address to the connection, making it consistently reachable. This is the correct approach for integrations that do not support managed tunnel platforms.

For installations where the router may move between sites or where network coverage is uncertain, a multi-network roaming SIM connects automatically to whichever UK network provides the strongest signal at the current location.

View IoT SIM cards on Router Store

Remote management

A 4G PoE router powering cameras in a remote location needs to be manageable without a site visit. Both platforms on Router Store provide this.

Milesight DeviceHub manages UR32 and UR75 routers from a central dashboard. Configuration changes, firmware updates, SIM failover events, and connection status are visible remotely. MilesightVPN creates a private overlay network between units, enabling access to cameras and connected devices without exposing them to the public internet.

Teltonika RMS manages the RUT951 PoE+ and the wider Teltonika fleet. Remote CLI access, configuration templates, data usage monitoring, and event alerts are all available. RMS Credits are consumed per managed device per month. Read the Teltonika RMS explainer.

Frequently asked questions

What does a 4G PoE router do that a normal 4G router does not?

A standard 4G router provides network connectivity only. Devices connected to its LAN ports receive data but must be powered separately. A 4G PoE router supplies both data and DC power over the same Ethernet cable, eliminating the need for a separate mains or PoE injector at each connected device.

Why do I need a 48V supply for the Milesight UR32 PoE?

PoE and PoE+ operate at a nominal 48V DC. The UR32 accepts a wide 9-48V input range for general use, but PoE output requires the supply voltage to be at 48V to drive the standard correctly at the connected device. At 12V or 24V, PoE output may not activate or may not deliver sufficient power. The Milesight 48V UK adapter is the correct supply for UK mains installation and must be ordered separately for UR32-P variants.

Can I power a PTZ camera from a Milesight UR32 PoE router?

UR32-P variants support 802.3af/at, providing up to 30W per port. Most PTZ cameras draw 15-25W, which sits within the 802.3at (PoE+) range. Confirm the camera’s PoE class before installation. The 48V supply must be in use for the PoE port to operate at full power.

How many cameras can the Teltonika RUT951 PoE+ power?

The RUT951 PoE+ has three PoE+ output ports with a 90W combined budget. Three standard IP cameras drawing 8W each uses 24W – four ports would be needed for four cameras, but only three PoE outputs are available. For four or more cameras, add a PoE switch to one of the LAN ports.

Can the RUT951 PoE+ be powered by another PoE source?

Yes. The LAN1 port on the RUT951 PoE+ supports 802.3af/at PoE input (PD mode). The router can draw its own power from an upstream PoE switch or injector through that port, removing the need for a DC mains adapter at the router’s installation point.

Is there a 5G version of these PoE routers?

Yes. The Milesight UR75-504AE-P-W2 provides 5G Sub-6 GHz connectivity with four PoE PSE ports and a 60W combined budget. It ships with a 48V adapter included. It is the correct choice where 5G coverage is available and higher throughput is required for multiple cameras or high-bandwidth applications.

Do I need a fixed IP SIM for CCTV remote viewing?

Not necessarily. If the CCTV system uses a cloud management platform (Milesight DeviceHub, MilesightVPN, Teltonika RMS, or a cloud NVR), remote access works through an outbound tunnel and a standard dynamic IP SIM is sufficient. A fixed IP SIM is only required for direct inbound connections where no managed platform is in use.

What is the difference between PoE and PoE+?

PoE (IEEE 802.3af) supplies up to 15.4W at the port, with around 12.95W available at the device. PoE+ (IEEE 802.3at) supplies up to 30W at the port, with around 25.5W available at the device. PoE+ is required for higher-powered devices such as PTZ cameras and dual-radio access points. All PoE+ ports are backward compatible with standard PoE devices.

Can I use a 4G PoE router in an outdoor cabinet without mains power?

Yes, if the cabinet is fed from a 48V DC source such as a UPS with 48V output, a solar charge controller feeding a 48V battery bank, or a 48V industrial power bus. The Milesight UR32-P accepts 9-48V DC directly. At 48V input, PoE output is fully active without the UK mains adapter. For solar installations with 12V or 24V battery systems, a DC-DC boost converter to 48V is required.

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4G PoE Router: Power Over Ethernet and Cellular Connectivity Explained