Avocent SC945H
Expert rating8 / 10
- Port Count:
- 4
- Video Standard:
- HDMI
- Max Resolution:
- 3840x2160
- Displays Per Computer:
- 2 displays
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Manufacturer: Avocent (Vertiv) Last updated: September 12, 2026
Avocent SC945H (4 Computers / Dual Monitor Secure KVM Switch) Review
The Avocent SC945H is a secure, government-grade 4-computer, dual-monitor KVM switch with isolated HDMI channels for classified and sensitive-network environments.
Vertiv built the SC900 series specifically for desks that sit across multiple security domains, so the isolation between channels is the entire point, not a nice-to-have. That security certification is what separates it from a general-purpose 4-port switch like the ATEN CS1924M, which is faster and cheaper but was never designed to keep data from leaking between networks. It also skips audio support entirely, a deliberate omission on secure KVMs since audio channels are a common data-exfiltration vector regulators flag.
Isolated Channels for Multi-Domain Desks
Each computer's video and USB path is electrically isolated from the others, meeting the kind of certification requirements government and defense desks are required to have before a KVM can touch a classified network.
No Audio, By Design
Unlike consumer KVMs, the SC945H has no audio switching at all, removing a channel that secure-desk auditors commonly flag as a risk.
Comparison to Alternatives
Versus the ATEN CS1924M — that's a faster, DisplayPort-capable 4-port switch, worth it for general office use where certification doesn't matter. Versus the Avocent SC780 — that scales to 8 computers instead of 4, worth it for larger secure operations centers.
Specifications
Design
| Port Count | 4 |
|---|---|
| Switching Method | Push button |
Topology
| Computers Supported | 4 computers |
|---|---|
| Displays Per Computer | 2 displays |
| KVM Segment | Secure |
Video & Features
| Video Standard | HDMI |
|---|---|
| Max Resolution | 3840x2160 |
| Audio Support | Yes |
Video interface
| Video Connector | HDMI |
|---|
Per display capability
| Max Resolution Single Display | 3840x2160 |
|---|
Switching control
| Button Switching | Yes |
|---|
| Brand | Avocent |
|---|---|
| Model | SC945H |
| Security | NIAP/PSD-certified data isolation between channels |
| Housing | Metal |
| Source URL | https://www.vertiv.com/globalassets/documents/manuals/cybex-secure-kvm/hdc10367_vertiv_4-port_dh_kvm_user_manual_rev.f.pdf |
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Expert rating8 / 10
The right pick when NIAP-grade channel isolation actually matters, not a general office KVM.
Best for
- Government and defense desks needing certified multi-domain isolation
- Secure operations centers switching between 4 classified/unclassified systems
- IT teams required to document KVM security compliance
Not for
- General office use where certification isn't required (cheaper switches suffice)
- Anyone wanting audio switching alongside video
- Users needing more than 4 computers or DisplayPort output
FAQs
What are the key specifications of the Avocent SC945H (4 Computers / Dual Monitor Secure KVM Switch)?
The Avocent SC945H (4 Computers / Dual Monitor Secure KVM Switch) is a KVM switch from Avocent (Vertiv). Key specs: Port Count 4 computers, dual monitor, Switching Method Button, hotkey, Video Standard HDMI, Max Resolution 1920x1200, USB Hub Ports 2.
Who is the Avocent SC945H (4 Computers / Dual Monitor Secure KVM Switch) best suited to?
It suits government and defense desks needing certified multi-domain isolation, secure operations centers switching between 4 classified/unclassified systems, it teams required to document kvm security compliance.
What are the drawbacks of the Avocent SC945H (4 Computers / Dual Monitor Secure KVM Switch)?
It is a poor fit for general office use where certification isn't required (cheaper switches suffice), anyone wanting audio switching alongside video, users needing more than 4 computers or displayport output.
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