HDMI over Fiber Extender Guide

From 300 m to 60 km: when you need fibre instead of copper, and how to pick among 12 current models

Every AV integrator eventually hits the same wall: how far can HDMI actually go? The honest answer depends on the medium. A passive copper HDMI cable is reliable for roughly a dozen metres. Cat6 with TCP/IP extenders inherits the 100 m Ethernet limit. Beyond that, fibre is the only sensible answer.

This page covers when copper stops working, how uncompressed optical conversion differs from IP encoding, and the five questions that narrow down a model. Every specification quoted below is taken from the corresponding ORIVISION product page, so you can click through and verify each figure.

1. When copper and Cat6 stop working

If any of these four applies to your project, rule out cable-based options early.

Runs longer than 100 m

100 m is the Cat6 Ethernet segment limit. Past that you either cascade repeaters or move to fibre - and cascading adds failure points.

Electrical rooms, risers or outdoor runs

Fibre carries light, not electricity, so electromagnetic interference and ground-loop problems between buildings simply do not apply.

Genuine uncompressed 4K@60

4K@60 demands far more pixel bandwidth than 1080p. ORIVISION 4K optical models are specified at 10 Gbps aggregate interface bandwidth.

Computers must stay locked in the server room

Keeping hosts in a controlled room and leaving only monitor and keyboard on the desk is standard practice in finance, government and utility control rooms. That requires USB-carrying KVM-over-fibre.

2. How HDMI over fibre actually works

In one line: HDMI electrical signals become light, travel down glass, and become HDMI again at the far end.

The transmitter drives an optical module with the HDMI TMDS signal, producing light pulses. The receiver converts them back to electrical HDMI. Nothing is compressed on the way, so there is no encode/packetise/decode stage and the image arrives intact. That is the real distinction from IP encoder solutions: those compress to H.264/H.265 and ship packets over a network, which enables recording, storage and wide distribution, but means image quality and latency must be judged against codec settings.

So the first decision is simple: choose uncompressed optical transceivers when you need bit-exact picture and immediate response; look at the encoder range when you need recording, distribution or platform delivery. ORIVISION builds both, in separate product lines.

3. Five questions that settle the model

Work through these five and the shortlist usually collapses to one or two part numbers.

1. Distance

ORIVISION fibre products fall into three tiers: 300 m over OM3 multimode, 10 km standard single-mode, and optional 20/40/60 km single-mode variants. A few models are flagged as customisable where longer reaches are needed.

2. Single-mode or multimode

Multimode with OM3 suits short campus runs and keeps optics cheaper. Single-mode over one LC core handles inter-building trunks and long distance. Stated reaches assume the matching fibre grade; always measure the installed cable.

3. Resolution

1920x1080@60Hz covers most video-wall and conferencing work. For 4K, check whether you need 4K@30Hz or 4K@60Hz - they use different hardware tiers, and 4K@60 models carry substantially more bandwidth.

4. KVM or not

If someone needs to drive a remote mouse and keyboard, pick a USB KVM model. Watch the receiver USB count: ZY-OKH901 offers four USB 2.0 ports for multiple peripherals.

5. Extra signals

Most models also carry RS232 (bidirectional on several), 3.5 mm audio and IR. Choose a transmitter with HDMI loop-out if you need a local monitor feed.

4. Where these are typically deployed

All of the following appear in the application lists of the products below.

Rail transit and metro PIS

Platform and tunnel displays sit well beyond Cat6 distance from the equipment room, which is why fibre is the default here.

Campus and security surveillance

Cross-campus and road-crossing camera runs solve distance, interference and lightning exposure in one step.

Broadcast and production

Studio to transmission hall, or OB van to venue, where lossless picture and no perceptible delay are non-negotiable.

Medical operating rooms

Surgical video reaches the teaching theatre uncompressed, while equipment hosts can be moved out of the clean area.

Command and control centres

Operator desks connect back to a central machine room over fibre, balancing reach against information security.

5. Current model comparison

Sorted shortest to longest reach. Every figure is quoted from the product page - click any model for the full parameter table.

Model Max Resolution Distance Interfaces & Features Typical Use
ZY-OH931 3840x2160@60Hz 300 m multimode LC single-core multimode; compact 57x16x14 mm body Short 4K runs inside one room
ZY-OH921 4K@30Hz 300 m multimode HDMI 2.0; LC single-core multimode Short-distance 4K30 cabling
ZY-OH1001 1920x1080@60Hz 10/20/40/60 km single-mode; 300 m multimode HDMI in with RS232 and 3.5 mm audio; dual HDMI out Long-reach 1080p workhorse
ZY-OH1201 3840x2160@60Hz 10/20/40/60 km single-mode; 300 m multimode HDMI in with RS232 and 3.5 mm audio; dual HDMI out Long-reach 4K60 workhorse
ZY-OH1202 3840x2160@60Hz 10 km single-mode HDMI 2.0 / HDCP 2.2; 10-bit; 10 Gbps aggregate Two 4K60 feeds over one path
ZY-OH1204 3840x2160@60Hz 10 km single-mode HDMI 2.0 / HDCP 2.2; 10-bit; 4 channels Four 4K60 channels from one rack
ZY-OH1301 3840x2160@60Hz 20 km (customisable) HDMI loop-out, RS232, IR and 3.5 mm audio Long reach with remote control
ZY-OKH1201 3840x2160@60Hz 10/20/40/60 km single-mode; 300 m multimode USB KVM; bidirectional RS232; HDMI loop-out 4K60 with remote keyboard control
ZY-OKH901 3840x2160@60Hz 10 km USB 2.0 in x1, out x4 at receiver; HDCP 2.2/2.3 Operator desks with several peripherals
ZY-OKH531 3840x2160@30Hz 10 km (customisable) USB x4, microphone, RS232 and audio Long-reach 4K30 KVM
ZY-OKH1001 1920x1080@60Hz 10/20/40/60 km single-mode; 300 m multimode USB KVM; bidirectional RS232; HDMI loop-out Long-reach 1080p KVM
multi-channel-hdmi-fiber 1920x1080@60Hz 10 km single-mode HDMI 1.4; 2 to 4 channels over multiple cores Several feeds onto one fibre run

FAQ

Cat6 links top out at 100 m. ORIVISION multimode models reach 300 m and single-mode models start at 10 km. Inside 100 m with a tight budget, Cat6 is fine; beyond that, or anywhere electrically noisy, specify fibre.
Match what you already have. Multimode models such as ZY-OH931 and ZY-OH921 are rated 300 m over OM3; single-mode runs over one LC core cover 10 km and beyond. Confirm the fibre type before ordering.
By model: ZY-OH931 reaches 300 m multimode; ZY-OH1201 offers optional 10/20/40/60 km single-mode; ZY-OH1202 and ZY-OH1204 are specified at 10 km single-mode; ZY-OKH1201 also offers optional 10/20/40/60 km. All figures assume matching fibre grade and should be confirmed against the installed cable.
These are uncompressed optical transceivers with no encode or decode stage, so there is no codec-induced delay and the picture stays intact. For a stated latency figure, check the relevant product page or ask an application engineer.
Yes - use a KVM model with USB: ZY-OKH1201, ZY-OKH901, ZY-OKH531 or ZY-OKH1001. ZY-OKH901 puts four USB 2.0 ports at the receiver for multiple peripherals.
Several models state it explicitly: ZY-OH1202 supports HDMI 2.0 / HDCP 2.2 and ZY-OKH901 supports HDCP 2.2/2.3. For anything else, confirm the specific product page before committing to a HDCP-critical workflow.
Yes. ZY-OH1301 (20 km nominal) and ZY-OKH531 (10 km nominal) are both listed as customisable, so longer reaches can be discussed as a custom build.
Usually yes. Confirm three things first: whether it is single-mode or multimode, the connector type (ORIVISION units use LC), and whether the cores are already in use.

Still deciding between models?

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