StarTech AF211C-POE-INJECTOR 1-Port Gigabit PoE+ Midspan Injector

Overview

The StarTech AF211C-POE-INJECTOR is a single-port midspan PoE+ injector designed to add IEEE 802.3at power delivery to any Gigabit Ethernet run — without replacing the switch behind it. If your existing switch lacks PoE and you need to power a surveillance camera, wireless access point, or VoIP endpoint at a specific location, this injector drops into the cable run between the switch and the device, passing data at full 1Gbps throughput while delivering up to 30W of DC power over the same cable. It accepts universal AC input (100–240V), outputs 54V DC at up to 0.6A, and supports cable runs out to 328 ft (100m) — the full IEEE standard distance.

The AF211C-POE-INJECTOR (often searched as AF211C POE INJECTOR) is wall-mountable, draws only 32.4W from the wall at full load, and carries a 2-year manufacturer warranty. It's a practical, low-cost way to extend powered Ethernet to an isolated device without deploying a managed PoE switch just for one port.

Key Features

• IEEE 802.3at PoE+ (30W max output): Delivers up to 30W to connected devices — enough headroom for PTZ cameras, dual-radio APs, and IP intercoms that exceed the 15.4W ceiling of older 802.3af equipment. It also falls back to 802.3af (15.4W) for legacy devices, so you're not locked into a single power class.
• Full 1Gbps data throughput: Both RJ45 ports negotiate 10/100/1000 Mbps auto-negotiation, so the injector introduces zero bandwidth penalty in the data path. Throughput isn't throttled to accommodate power delivery — the link runs at full gigabit speed regardless of PoE load.
• 9K jumbo frame support: Passes jumbo Ethernet frames up to 9,000 bytes — relevant in storage and video surveillance networks where jumbo frames are used to reduce CPU overhead on high-bitrate streams. Many low-cost injectors cap out at standard MTU and silently drop oversized frames.
• 54V DC output at 0.6A: The higher rail voltage (54V vs the 48V baseline) helps maintain stable power delivery across longer cable runs where resistive loss would otherwise cause voltage sag. At 100m on 24AWG Cat5e, the device still receives adequate power at the far end.
• Universal 100–240V AC input: Works on any standard wall outlet worldwide — useful for deployments that span multiple buildings or international sites without requiring a separate power converter.
• ESD protection ±8kV contact / ±15kV air discharge: Built-in transient protection on both RJ45 ports guards against electrostatic events common in outdoor cable runs or industrial environments where long cable paths accumulate charge. This level of protection is often absent on generic no-name injectors.
• 328 ft (100m) maximum cable length: Supports the full IEEE 802.3 horizontal cabling distance. No de-rating for powered runs — you get the full 100m budget from switch port to device.
• Wall-mountable form factor: The compact 3.9 × 2.3 × 1.3 in housing includes wall-mount capability, so it can be secured inside a wiring closet, on a junction box, or near a ceiling mount rather than sitting loose on a shelf. Weight is just 3.5 oz — minimal structural requirement.
• Operating range 0°C to 50°C: Suitable for conditioned indoor environments including server rooms, wiring closets, and climate-controlled IDF spaces. Not rated for outdoor or unconditioned enclosures — if the installation point drops below freezing, this needs to be inside a heated enclosure.

Integration & Compatibility

The AF211C-POE-INJECTOR is switch-agnostic — it sits between any non-PoE Gigabit switch port and the powered device, passing data transparently. There's no management interface, no VLAN tagging, and no configuration required. It is fully passive in the data path. This makes it compatible with any PoE network switch infrastructure or direct NIC connection, and equally compatible with any IEEE 802.3at or 802.3af powered device (PD) — IP cameras, access control readers, intercoms, wireless APs, and VoIP phones.

For surveillance deployments, pair this injector with a network video recorder port running to a camera location where PoE isn't available on the upstream switch. It also works with any IP security camera that draws under 30W — the vast majority of fixed cameras on the market today. If you're planning a multi-camera deployment and need to evaluate total power requirements, review a PoE planning guide before sizing your infrastructure.

Frequently Asked Questions

Q: Does the AF211C-POE-INJECTOR support both PoE and PoE+ devices?

A: Yes. It supports IEEE 802.3at Type 2 (PoE+, up to 30W) and IEEE 802.3af Type 1 (PoE, up to 15.4W). The injector auto-negotiates the appropriate power class with the connected device, so legacy 802.3af cameras and phones work alongside newer PoE+ devices without any configuration change.

Q: What is the maximum cable length supported?

A: The AF211C-POE-INJECTOR supports a maximum cable run of 328 ft (100m), which is the full IEEE 802.3 horizontal cabling specification. No de-rating is required for powered runs within this distance.

Q: Can this injector be wall-mounted?

A: Yes, the unit supports wall mounting. Its compact 3.9 × 2.3 × 1.3 in footprint and 3.5 oz weight make it easy to secure in a wiring closet or near the cable entry point at the device location.

Q: What input voltage does the AF211C-POE-INJECTOR require?

A: It accepts 100–240V AC input, making it compatible with standard wall outlets in North America, Europe, and most international markets without an external voltage converter.

Q: Does this injector affect data throughput or introduce latency?

A: No. The injector is transparent in the data path. Both ports support 10/100/1000 Mbps auto-negotiation and pass jumbo frames up to 9K bytes. Data throughput and latency are unaffected by PoE operation.

Q: What is the warranty on the AF211C-POE-INJECTOR?

A: StarTech covers the AF211C-POE-INJECTOR with a 2-year manufacturer warranty.

Marty Allison

The AF211C-POE-INJECTOR is the kind of device I recommend when an integrator already has a perfectly good non-PoE switch in the rack and needs to power a single camera or access reader at a location that wasn't planned for PoE. At 30W output and 54V DC on the line, it handles virtually any IEEE 802.3at device without voltage sag concerns — even at the full 100m cable run.

Technical Highlights:

• 30W PoE+ output at 54V DC: The elevated output voltage versus a standard 48V rail compensates for resistive loss on long Cat5e/Cat6 runs, keeping the device-end voltage within IEEE spec at the full 100m distance.
• 9K jumbo frame passthrough: Prevents silent frame drops on high-bitrate surveillance streams — a detail that separates this from cheaper injectors that silently truncate oversized frames and cause intermittent camera dropouts that are a nightmare to diagnose.
• ±15kV air discharge ESD protection: Both ports are protected against electrostatic discharge events — relevant when the cable path runs through conduit near HVAC equipment or exits a building briefly before re-entering. This level of surge protection isn't universal in single-port injectors.

Deployment Considerations:

• Operating temperature tops out at 50°C — keep this in mind for IDF closets with poor ventilation or any installation near heat sources. At 32.4W wall consumption it generates minimal heat of its own, but ambient environment matters.
• This is an unmanaged, single-port device with no SNMP, no remote monitoring, and no port status visibility. If power-cycle management or link-state alerting is a requirement, you need a managed PoE switch rather than an injector.

Best fit: a retrofit deployment where one or two cameras need to be added to an existing non-PoE switch infrastructure — retail entrances, small office access points, or parking lot camera additions where running a full PoE switch replacement isn't justified by the scope.