> 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/rack-chassis-mounting.md).

# Rack Chassis Mounting

{% hint style="info" %}
**NOTE:** It is recommended that the installation of the Onyx FHM into a network rack or chassis be done by two trained professionals. One individual should hold the equipment in position on the rack while the other secures it in place.
{% endhint %}

The Onyx FHM is typically installed in an EIA 19-inch rack or chassis. The following steps detail this installation application.

{% hint style="info" %}
**NOTE:** Illustrations are for reference purposes only. Actual scenario and equipment may differ. Screws for rack posts not included.
{% endhint %}

{% stepper %}
{% step %}
Secure the Rack Mount Brackets onto the equipment. Align the rack mount brackets with the holes provided on the right and left sides of the Onyx FHM Chassis and secure the brackets using 8 pcs. of the M4, 6.5mm Long screws provided with the unit using #2 Phillips Screwdriver. Torque screws to 20 in-lbs. (2.3 Nm) +/- 10%.

<p align="center"><strong>Installation of Rack Mount Brackets (Front Mount)</strong></p>

<figure><img src="https://4084968256-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgSxa0NIdBp5aDw7Lf2N9%2Fuploads%2FCl25ELAF4TOPgzXzgevT%2Fimage.png?alt=media&amp;token=3d1517a0-c2e6-45fa-be72-3d2f9542b019" alt="" width="519"><figcaption></figcaption></figure>
{% endstep %}

{% step %}
Identify the unit slot where the Onyx FHM will be installed in the selected rack or chassis. As applicable, mark fastener location or install clip / cage nuts in fastener location. Verify that selected fastener locations are level between left and right posts of the rack or chassis.
{% endstep %}

{% step %}
Using assistance (2nd person) or a 19” equipment lift (if available), lift the Onyx FHM chassis and insert it into the rack, centering the fastener holes with those marked in the earlier step.
{% endstep %}

{% step %}
Install and torque rack/chassis mounting screws per the rack/chassis manufacturer’s specifications.

<p align="center"><strong>Installation of Mounting Screws</strong></p>

<figure><img src="https://4084968256-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgSxa0NIdBp5aDw7Lf2N9%2Fuploads%2FFAyte0YzRf1JH6nEo32U%2Fimage.png?alt=media&amp;token=5f3111ee-991d-4fbe-a458-437a2c8031a9" alt="" width="563"><figcaption></figcaption></figure>

{% hint style="info" %}
**NOTE:** For rack post widths wider than 19”, different brackets are available upon request (see *Figure: Alternative Rack Installations*).
{% endhint %}

<p align="center"><strong>Alternative Rack Installations</strong></p>

<figure><img src="https://4084968256-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgSxa0NIdBp5aDw7Lf2N9%2Fuploads%2FYXI71QEdk0vyhmscBWUM%2Fimage.png?alt=media&amp;token=01812736-91a8-42ef-8958-d309f0fd34b4" alt="" width="563"><figcaption></figcaption></figure>
{% endstep %}
{% endstepper %}


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