Panduit 1PK JACK MOD BLOCK-OUT DEVICE 10 BLOCK-O MOQ20 - PSL-DCJB-YL
Yellow jack block-out device designed to physically secure unused network ports
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The Panduit PSL-DCJB-C is a polycarbonate RJ45 port block-out device designed to physically prevent unauthorized cable insertion into open network jacks. If your environment has unpopulated ports on patch panels, wall plates, or switch faceplates that represent a physical-layer intrusion risk or a dust contamination problem, this is a direct, hardware-enforced answer. Each PSL-DCJB-C unit seats into a standard RJ45 opening and cannot be removed without the included keyed removal tool — no patch cable goes in without deliberate action from someone who has that tool.
The red color coding is a deliberate operational choice: red is the conventional signal for a blocked or restricted port in structured cabling environments, making unauthorized removal attempts immediately visible during a walk-through audit. At 0.46 in. wide and 0.4 in. tall, the insert profile is compact enough to seat flush in dense 24- or 48-port patch panels without physically interfering with adjacent occupied ports.
The PSL-DCJB-C is part of Panduit's Panduit physical security and copper systems line, designed to work alongside structured cabling infrastructure rather than requiring a proprietary ecosystem. The inserts fit standard RJ45 openings — the same jack geometry used across Cat5e, Cat6, Cat6A, and Cat8 patch panels and keystone modules from virtually any manufacturer. There is no electrical or data component; compatibility is purely mechanical, governed by the RJ45 form factor standard.
For environments building out a layered physical security program, these inserts pair naturally with network access control infrastructure — the block-out devices enforce the physical layer while 802.1X and NAC handle the logical layer. Neither substitutes for the other. If you're speccing a new PoE switch deployment with open downlink ports, ordering PSL-DCJB-C inserts alongside the switch is a straightforward way to close the physical gap from day one.
The red color is the standard for blocked/restricted designation in most structured cabling color-coding schemes, but confirm against your site's existing color-code policy before deploying at scale — some facilities use red for a different designation (e.g., emergency circuits), which could create confusion during audits.
Q: Does the PSL-DCJB-C fit all RJ45 jacks, or only Panduit keystones?
A: Panduit states the PSL-DCJB-C is designed to work with most standard RJ45 openings — patch panels, wall plates, and switch faceplates across brands. It is not limited to Panduit keystones. That said, verify fit on any non-standard or proprietary jack profiles before deploying in bulk.
Q: Can the PSL-DCJB-C be removed without the included tool?
A: The insert is designed to require the included removal tool for extraction. This is its core security function — preventing casual or unauthorized removal. The five tools included per 100-pack should be inventoried and controlled like any keyed access item in your facility.
Q: How many removal tools come with each pack of 100?
A: Each pack includes five removal tools for the 100 inserts. If you are deploying across multiple sites or need to equip a larger team, plan your tool quantity accordingly — additional tool packs may need to be sourced separately.
Q: What regulatory or compliance frameworks does port blocking with the PSL-DCJB-C address?
A: Physical port access control is a requirement in several frameworks including PCI-DSS (Requirement 9.1.2), HIPAA physical safeguards, and NIST SP 800-53 PE controls. The PSL-DCJB-C enforces physical-layer port restriction, which is one element of meeting those requirements. Compliance determination is always the responsibility of your compliance team — the insert is a physical control, not a compliance certification.
Q: What is the PSL-DCJB-C made of, and is it durable enough for a data center environment?
A: The inserts are molded from polycarbonate, which handles the temperature and humidity ranges typical of server rooms and IDFs without warping or becoming brittle. For outdoor or extreme-environment applications, verify the specific environmental rating — this product is designed for standard indoor infrastructure.
Q: Is PSL-DCJB-C sold individually or only in packs?
A: The PSL-DCJB-C is packaged as a 100-unit pack (package quantity: 1 pack of 100). Carton quantity is 10 packs, so full-carton orders yield 1,000 inserts. Individual unit sales are not the standard configuration for this SKU.

The PSL-DCJB-C addresses something that gets skipped in a lot of structured cabling deployments: open RJ45 ports are a physical security gap that no amount of 802.1X configuration fully closes, because an attacker who plugs in before the switch negotiates 802.1X can still probe the layer. At 0.46 in. wide and 0.4 in. tall, these polycarbonate inserts seat into standard RJ45 openings without protruding past the faceplate, and they require the included removal tool to extract — which is the point. The PSL-DCJB-C (often searched as PSL DCJB C) is a hardware enforcement layer, not a deterrent sticker.
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Deployment Considerations:
For PCI-DSS-scoped environments, healthcare facilities under HIPAA, or any site where a physical security audit requires documented port access controls, the PSL-DCJB-C is the right tool: inexpensive per-port, visually auditable, and hardware-enforced rather than policy-enforced.
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