Adder AVSC1104 Secure 4-Port USB VGA KVM Switch
Expert rating9 / 10
- Port Count:
- 4 computers
- Video Standard:
- VGA
- Security Certification:
- EAL4+ / Tempest, CAC support
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Manufacturer: Adder Technology Last updated: 2026-09-12
Adder AVSC1104 Secure 4-Port USB VGA KVM Switch Review
Adder AVSC1104 secure 4-port USB VGA KVM switch EAL4+ Tempest certified CAC smart card support, government classified network isolation switch, multi-network secure desk
The 4-network sibling of the AVSC1102, for operators juggling more than two classification levels or agency networks from a single desk, with the same certified isolation and CAC-following smart-card switching.
Scaling Beyond Two Networks
Multi-INT analyst desks and joint-agency workstations often need three or four separate networks at hand, this model extends the AVSC1102's certified isolation model to that scale without changing the security posture.
One Desk, Four Networks, Zero Cross-Contamination
Each of the four channels is fully isolated at the hardware level; switching between them clears buffers so no data or credentials persist across the boundary.
Comparison to Alternatives
If only two networks are needed, the AVSC1102 offers the identical certification at lower cost. Adder's AVSV1004 provides the same 4-port count without the CAC reader for sites that authenticate differently. Raritan's RSS-104C4K is the closest non-Adder equivalent, adding DVI/HDMI/audio support at 4 ports for facilities needing modern video standards alongside secure isolation.
Our verdict
Reviewed by Burooj Alam. Rated by us, not by users.
Expert rating9 / 10
The practical choice for classified desks juggling three or four separate networks with CAC authentication.
Best for
- Multi-agency or multi-INT analyst desks needing 4 isolated networks
- Government facilities standardizing on CAC-based network authentication
- SCIF environments requiring Tempest-rated equipment
Not for
- Desks needing only 1-2 networks (the AVSC1102 is cheaper)
- Environments needing DVI/HDMI rather than VGA video
- General commercial IT with no classification requirements
Specifications
What these specs meanHow much this switch can do compared with other secure KVM switches, rated from its certification and specifications.
Identity
| Brand | Adder Technology |
|---|---|
| Model Number | AVSC1104 |
| Switching Method | Push button |
Topology
| Computers Supported | 4 computers |
|---|---|
| Displays Per Computer | 1 displays |
| KVM Segment | Secure |
Video & Features
| Video Standard | VGA |
|---|---|
| Max Resolution | 1920x1200 @ 60Hz |
| Audio Support | No |
Video interface
| Video Connector | VGA |
|---|---|
| Video Interface Version | VGA |
Per display capability
| Max Resolution Single Display | 1920x1200 |
|---|---|
| Max Refresh At Max Resolution | 60 Hz |
USB peripheral switching
| Dedicated HID Ports | 2 ports |
|---|
Switching control
| Button Switching | Yes |
|---|---|
| Hotkey Switching | No |
FAQs
What are the key specifications of the Adder AVSC1104 Secure 4-Port USB VGA KVM Switch (EAL4+/Tempest, CAC Support)?
Key specs for the Adder AVSC1104 Secure 4-Port USB VGA KVM Switch: Dedicated HID Ports 2 ports, Max Resolution 1920x1200 @ 60Hz, Max Resolution Single Display 1920x1200, Max Refresh At Max Resolution 60 Hz, Max Resolution Per Display 1920x1200, Audio Support No.
Who is the Adder AVSC1104 Secure 4-Port USB VGA KVM Switch (EAL4+/Tempest, CAC Support) best suited to?
Best suited to: Multi-agency or multi-INT analyst desks needing 4 isolated networks; Government facilities standardizing on CAC-based network authentication; SCIF environments requiring Tempest-rated equipment.
What are the drawbacks of the Adder AVSC1104 Secure 4-Port USB VGA KVM Switch (EAL4+/Tempest, CAC Support)?
Not the best fit for: Desks needing only 1-2 networks (the AVSC1102 is cheaper); Environments needing DVI/HDMI rather than VGA video; General commercial IT with no classification requirements.
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