Vertiv GL48WMCMS-B-SC-00-00 25U Wall-Mount Network Enclosure
Overview
The Vertiv GL48WMCMS-B-SC-00-00 is a 25U (48-inch) wall-mount enclosure engineered for edge networking, telecom closets, and security head-end installations where floor space is at a premium. Configured in black with a SEAL Combo access-control handle, mesh door, fan airflow kit, and cable bar, this unit arrives ready to support active network gear, NVRs, and patching infrastructure without requiring a separate floor-standing rack footprint. For teams sourcing from the broader Vertiv enclosure and power catalog, the GL48WMCMS-B-SC-00-00 sits firmly in the mid-capacity wall-mount tier — large enough to house a meaningful stack of 1U switching and patch panels, small enough to mount cleanly in a telecom room or above a security console.
The enclosure is part of Vertiv's configurable WM Premium line, which covers three height options (12U/24-inch, 19U/36-inch, and 25U/48-inch), multiple door styles, two color choices, and three access-control tiers. This specific SKU locks in the 25U/48-inch height with the color, door, lock, airflow, and cable management combination described below — reducing field configuration time when you already know your build-of-materials requirements.
Key Features
- 25U (48-inch) Usable Height: At 25U, this enclosure accommodates a full edge stack — 24-port PoE switch, patch panel, NVR, and a few 1U blanks — without the lateral sprawl of a 12U or the need for a floor-standing 42U cabinet. Right-sized for IDF closets and security head-ends where you want vertical density without occupying a dedicated rack bay.
- Black Finish: The black powder-coat finish blends with standard 19-inch equipment faceplate aesthetics and is the typical specification for server rooms and network closets. Winter White is available elsewhere in the WM Premium family for environments where the enclosure is surface-mounted in a visible office or reception area.
- SEAL Combo Access Control: The SEAL Combo lock provides dual-mode access — key override plus electronic credential — meaning facilities staff with a physical key and IT staff with an electronic code can both access the enclosure independently. Compared to a swing handle (no lock) or SEAL Electronic (credential-only), the Combo variant is the practical choice for multi-tenant or shared-responsibility deployments where lockout risk from a dead battery or lost credential is unacceptable.
- Mesh Door: A mesh front door passes airflow passively without the tool requirement of a solid door swap for ventilation. If your load is lower-wattage (patching, fiber, low-draw switches), the mesh door alone may be sufficient — the fan kit adds active assist for higher thermal loads. Plexiglass and solid door options exist in the WM Premium family if your site requires dust exclusion or physical tamper-evidence over airflow.
- Fan Airflow Kit: Active fan cooling in this configuration means the enclosure can handle thermally loaded switching and compute gear that a passive enclosure cannot. Fans draw cooler ambient air through the mesh door and exhaust through the top or rear — critical when your PoE switch, NVR, and patch panel together push meaningful BTUs in an enclosed wall-mount that lacks the open convection path of a floor-standing open-frame rack.
- Cable Bar Included: The cable bar provides a horizontal management point inside the enclosure, reducing stress on rear-panel ports and keeping patch runs organized between the patch panel and active gear. In a 25U space with dense patching, unmanaged cables can block airflow and complicate troubleshooting — the cable bar addresses both. 'None' and 'Clear' variants exist in the family if your cable count is low or you want unobstructed visual access to rear wiring.
- Three Height Options in the WM Premium Family: The GL48WMCMS-B-SC-00-00 is the 25U configuration. The same platform is available in 12U (24-inch) and 19U (36-inch) — useful when you're standardizing on a single enclosure platform across sites with varying density requirements. Ordering within the same family keeps spare-parts, mounting hardware, and access-control credentials consistent across locations.
Integration and Compatibility
The GL48WMCMS-B-SC-00-00 accepts standard 19-inch rackmount equipment — switches, patch panels, NVRs, UPS units, and fiber consolidation points all mount on the standard EIA-310 rail spacing. The SEAL Combo lock integrates with Vertiv's broader access-control ecosystem if you're managing credential issuance centrally across multiple enclosures. For PoE network switches and associated NVR platforms being housed in this enclosure, verify the installed equipment's depth against the enclosure's internal depth before finalizing the build — wall-mount enclosures have tighter depth constraints than floor-standing cabinets, and high-port-count switches can run 18–24 inches deep. Pair with a wall-mount UPS sized for your active load if runtime during outages is a requirement; the 25U height typically leaves room for a 1–2U rackmount UPS alongside your network stack. For cabling infrastructure guidance, the structured cabling category covers patch panels, keystone jacks, and cable management accessories that pair with this enclosure.
Frequently Asked Questions
Q: What is the usable rack space in the GL48WMCMS-B-SC-00-00?
A: This configuration provides 25U of usable rack space in a 48-inch (GL48) wall-mount chassis. The WM Premium family also offers 12U (24-inch) and 19U (36-inch) variants if your density requirements differ.
Q: What type of door does the GL48WMCMS-B-SC-00-00 ship with?
A: This SKU is configured with a mesh door, which supports passive airflow and complements the included fan kit. Plexiglass and solid door options are available in other WM Premium configurations.
Q: What access control does the SEAL Combo lock provide on the GL48WMCMS-B-SC-00-00?
A: The SEAL Combo lock supports both key-based and electronic credential access. This dual-mode design prevents lockout if one access method fails — particularly important in multi-team or facilities-managed environments. The WM Premium line also offers a swing handle (no lock) and SEAL Electronic (credential-only) variants.
Q: Does the GL48WMCMS-B-SC-00-00 include active cooling?
A: Yes. This configuration includes a fan airflow kit for active thermal management. Units in the WM Premium family can also be ordered without fans if passive cooling is sufficient for the installed load.
Q: What cable management is included with the GL48WMCMS-B-SC-00-00?
A: This SKU ships with a cable bar for horizontal cable routing and strain relief inside the enclosure. 'None' and 'Clear' cable management options are available in alternate WM Premium configurations.
Q: What color is the GL48WMCMS-B-SC-00-00?
A: This unit is finished in black. Winter White is available in other WM Premium SKU configurations for installations in visible or office-facing environments.
The GL48WMCMS-B-SC-00-00 is the configuration I reach for when a site has a legitimate 25U density requirement but no floor space to give up — the SEAL Combo lock in particular is worth calling out, because on multi-team sites where facilities holds a master key and IT manages electronic credentials, a credential-only lock creates real operational friction the Combo variant simply avoids.
Technical Highlights:
- 25U / 48-inch Height: Enough vertical space to house a 24-port PoE switch, a 1U patch panel, a 4-8 channel NVR, and blanking panels in a single wall-mount footprint — without stepping up to a floor-standing cabinet that a telecom closet may not have room for.
- Fan Airflow Kit: Active fan cooling is the right call when the enclosure is carrying a PoE switch with a meaningful wattage budget alongside an NVR that runs 24/7. Passive mesh-only enclosures can thermal-throttle active gear in poorly ventilated rooms; the fan kit removes that variable.
- SEAL Combo Access Control: Dual-mode key plus electronic access means neither access path is a single point of failure. Swing-handle-only units leave the enclosure unsecured; SEAL Electronic-only units risk lockout on battery depletion or credential system failure — the Combo is the operationally safe middle ground.
Deployment Considerations:
- Confirm your deepest installed component's depth against the enclosure's internal depth before ordering — wall-mount chassis have tighter depth clearance than floor-standing racks, and 24-port managed switches from some vendors push 18+ inches.
- The cable bar manages horizontal runs well, but in a fully populated 25U enclosure with dense patching, consider whether a single bar is sufficient or whether you'll want additional vertical cable management accessories on the sides — the WM Premium platform supports add-on accessories, but verify compatibility before the install date.
This enclosure fits best in IDF closets and security head-ends at mid-size commercial sites — branch offices, multi-floor retail locations, or school buildings — where a single 25U wall-mount consolidates switching, patching, and NVR recording in one lockable, actively cooled unit without consuming floor space that doesn't exist. The GL48WMCMS-B-SC-00-00 (also searched as GL48WMCMS B SC 00 00) is the right spec when your BOM is already fixed at this density tier.
