> For the complete documentation index, see [llms.txt](https://docs.gxc.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.gxc.io/hw/5g/5g-fronthaul-multiplexer/fhm-hardware-installation-guide/about-this-guide.md).
# About this Guide
This guide provides the information you need to install a GXC Onyx FHM Rack-Mounted Fronthaul Multiplexer. It also includes a general description of the unit, an overview of its capabilities, and guidelines for its installation.
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**NOTE:** Mechanical installation of this device must be conducted by certified or experienced engineers and/or installers.
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**NOTE:** Before operating the server, carefully read all the manuals included with the product.
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In this guide, the GXC Onyx FHM may be referred to as Rack-Mounted Fronthaul Multiplexer, GXC FHM, Onyx FHM, and FHM.
## General Installation Information
ONLY experienced installation professionals who are familiar with local building and safety codes and, wherever applicable, are licensed by the appropriate government regulatory authorities should install industrial electrical devices. Installation by uncertified individuals may void the product warranty and may expose the end user to legal and financial liabilities. The manufacturer and its resellers or distributors are not liable for injury, damage or regulation violations associated with the installation of this device.
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**NOTE:** The GXC Onyx FHM 5G Fronthaul Multiplexer is designed to be installed and operated in environmentally protected locations conforming to its operational specifications.
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## Safety Information
### Electrical Safety
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**WARNING:** This product is equipped with a three-wire power cable and plug for the user’s safety. Use the power cable with a properly grounded electrical outlet to avoid electrical shock.
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**WARNING:** This product relies on the existing building or structure for short-circuit (overcurrent) protection. Ensure that the protective device is rated no greater than 15A.
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* Read these installation instructions before connecting the product to its power source.
* Equipment installation must comply with local and national electrical codes.
* Before installing or removing signal cables, ensure that the power cables for the system and all attached devices are unplugged.
* When adding or removing any additional devices to or from the system, ensure that the power cables for the devices are unplugged before the devices are connected. If possible, disconnect all power cables from the existing system before you add a device.
* To prevent electrical shock hazard, disconnect the power cable from the electrical outlet before relocating the system.
* If the unit’s power supply is broken, do not try to fix it by yourself. Contact a qualified service technician or your supplier.
## Operation Safety
* Any mechanical operation on the FHM must be conducted by certified technicians or experienced engineers.
* Before operating the FHM, carefully read all the manuals included with the FHM package.
* Before using the FHM, ensure all cables are correctly connected and the power cables are not damaged. If any damage is detected, contact your supplier as soon as possible.
* To avoid short circuits, keep paper clips, screws, and staples away from connectors, slots, sockets and circuitry.
* Avoid dust, humidity, and temperature extremes. Install the FHM into a EIA-310 19-inch network rack or cabinet.
* If you encounter technical problems with the FHM, contact a qualified technician or your supplier.
### Optical Safety Information
#### Laser Safety Information
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**CAUTION:** The FHM optical transceiver accessories are Class 1 Laser Products. To prevent exposure to the laser radiation emitted from the optical drive, optical transceiver or associated cables, do not attempt to disassemble or repair the optical transceivers. For your safety, contact a professional technician for assistance.
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---
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