FHM Hardware Installation Guide
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.
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.
Safety Information
Electrical Safety
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.
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.
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
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.
Introduction and Features
System Introduction
The GXC Onyx FHM 5G Fronthaul Multiplexer is an AC-Powered, high-performance, versatile open networking fronthaul device that is designed to expand coverage and maximizes DU resources with flexibility as service providers improve their services. Implementing O-RAN’s shared cell function, the Onyx FHM enables optimization of the user’s private 5G network by utilizing DU resources efficiently and streamline the upgrading process when increasing service capacity.
The Onyx FHM is future-proofed with a powerful 4-core processor, a programmable FPGA, 10GE/25GE interfaces, and full timing features supporting IEEE 1588v2 and SyncE. It is suitable for indoor and outdoor cabinet deployments with redundant, hot swappable components for convenience, increased availability, reliability and lower costs of maintenance.
This document describes the hardware installation process for the Onyx FHM.
System Package Contents
Check your system package for the following items.
System Package Contents
1
Onyx FHM Chassis without PSU
17.32” x 9.84” x 1.71” (440 x 250 x 43.5mm)
1 pc.
9.22 lbs. (4.18kg)
2
AC Power Supply Unit (PSU)
1.99” x 8.31” x 1.58” (50.5 x 211.0 x 40.2mm)
2 pcs.
1.58 lbs. (0.72kg)
3
Grounding Lug
1.97” x 0.44” x 0.30” (50.0 x 11.1 x 7.5mm)
1 pc.
0.022 lb. (10.0g)
4
Grounding Lug Screw Kit
2X Screws M4, 8.0mm Long 4X M4 Lock Washers
1 set
0.01 lb. (3.5g)
5
19-inch Rack Mount Bracket
1.98” x 1.69” x 0.79” (50.4 x 43.0 x 20mm)
2 pcs.
0.07 lb. (32.7g)
6
Rack Mount Bracket Screw Kit
8X Screws M4, 6.5mm Long
2 sets
0.02 lb. (7g)
7
USB 2.0 Type-A Cable
7.87” (200mm)
1 pc.
0.023 lb. (10.5g)
8
AC Power Cord
72.05” (1830mm)
2 pcs.
0.46 lb. (207g)
9
RJ45 to DB9 Female Cable
95.98” (2438mm)
1 pc.
0.23lb. (105g)
10
Screw Kit
2X Screw M4, 25mm Long 2X Dia. 8mm x 25mm Long
2 sets
0.009 lb. (4.50g) 0.005 lb. (2.25g)
GXC Onyx FHM Dimensions
GXC 5G Onyx Platform Architecture
Onyx FHM Front Panel View
Onyx FHM - Front Panel View
Onyx FHM Rear Panel View
Onyx FHM - Rear Panel View
AC PSU Overview
Power Supply Unit (PSU) with 1+1 redundancy. Hot swappable, field replaceable unit (FRU).
PSU Dimensions and Details
Preparation
Environmental Requirements
In addition to network planning, when determining where to place the GXC Onyx FHM you need to consider factors such as climate, hydrology, geology, the possibility of earthquakes, reliable electric power, and transportation access.
Avoid locating the unit in areas where there may be extreme temperatures, harmful gases, unstable voltages, excessive vibrations, open flames, explosives, or electromagnetic interference (e.g., large radar stations, transformer substations). Avoid areas prone to impounded water, soaking, leakage, or condensation. The following table lists the environmental specifications.
Environmental Specifications
Operating Temperature
-40° to 65°C / -40 to 149°F
Relative Humidity
5 % to 95 % RH (non-condensing)
Atmospheric Pressure
70 kPa to 106 kPa
Operating voltage
100 to 240VAC (Universal)
Typical Power Consumption
300W (max typical)
Mounting Considerations
The GXC Onyx FHM has a unit width of 17.32 inches (440mm), as shown above. The unit ships with rack mount brackets suitable for EIA-Standard 19-inch (483 mm) racks. The rack mount brackets can be installed at the front or in the center of the unit.
The depth of the Onyx FHM chassis is 9.84 inches (250mm) without the field replaceable PSUs. To accommodate the air inlet and front cabling, a minimum clearance of 6 inches (152mm) in front of the unit is specified, thereby making the minimum reserve depth 15.84 inches (402.3mm).
The 19-inch Rack Mount Brackets included with the GXC Onyx FHM can be utilized to mount the unit in two different positions relative to the front of the unit.
The Front Mount Approach is more commonly used for rack-mounted equipment. However, this mounting approach results in increased stress on the mounting brackets due to the center of gravity of the unit being behind the mounting point. These stresses can be resolved by installing the unit directly above other equipment that is supported by rear posts of a 4-post rack or the use of a 1U Rack Shelf.
Alternatively, a Center Mount Approach can be used for the GXC Onyx FHM. In this approach, the 19-inch Rack Mount Brackets are affixed to the unit at the center of depth mounting location. This approach reduces stress on the mounting brackets by mounting the unit at a depth very close to its center of gravity. However, utilizing this mounting approach causes the front of the Onyx FHM to protrude from the front of the rack by approximately 4.40 inches (112mm).
The following figure depicts typical Front Mount and Center Mount orientations for the GXC Onyx FHM in a 19-inch rack.
Onyx FHM Mounting Approaches and Critical Dimensions
Optical Port Overview
The following table and figure are meant to help the installer and user of the Onyx FHM in identification of the various optical ports, specify the maximum supported communication distances and the supported connection speeds.
Optical Port Specifications
0 - 7
SFP28
6.21mi (10km)
10/25G
8 - 11
SFP28
6.21mi (10km)
10/25G
12 - 13
QSFP28
6.21mi (10km)
40/100G
Optical Port Identification
Equipment Cooling
The GXC Onyx FHM utilizes internal fans to intake air from the front to cool the internal electronics. Heat is transferred to this air and then exhausted out the back of the unit. Care should be taken during installation to ensure that adjacent equipment in the same rack uses this same front-to-back airflow orientation.
CAUTION: Failure to ensure adjacent equipment utilizes a front-to-back airflow orientation can lead to elevated intake air temperatures, a reduction in the operational air temperature margins, and possible reductions in operation stability of the Onyx FHM.
Front-to-Back Airflow Depiction
The GXC Onyx FHM requires clearance at the front and back of the unit to ensure adequate airflow to the unit. Care should be taken to avoid equipment cables or other materials from blocking both the intake and the exhaust vents to the unit.
Onyx FHM Front and Back Airflow Clearances
Grounding Protection
You must protect the GXC Onyx FHM against accidental electrostatic discharge (ESD) or shortage of power to ground. The following guidelines concerning grounding must be followed.
In addition to the AC Line Ground (Signal Ground), a discrete Earth Ground shall be provided and terminated using the provided 2-Hole Compression Lug (0.625-inch (16mm) lug-to-lug spacing). This grounding lug and its associated M4 mounting screws and lock washers are included with the Onyx FHM. The installer must provide a 6 AWG Grounding Cable which will be terminated to the lug and attached to the unit where shown.
Grounding Lug Hardware Assembly Detail
Grounding Compression Installation Location Detail
Details regarding installation of the Ground Lug shall be provided in the Installation Section of this document.
Pre Installation
This section describes the recommended location and environment required for best performance of the Onyx FHM and the materials and tools needed to install the Onyx FHM.
Installation Location
The Onyx FHM is designed to be installed in either a 19-inch standard rack or chassis that conforms to EIA-310 dimensions, or to be mounted flush to a wall.
When front mounted in a 19-inch Rack or Chassis, the rack or chassis must have a front-to-back clearance (depth) of no less than 10.9 inches (277mm).
The Onyx FHM is air cooled by its integrated fans and relies on intake air that has a temperature of -40°C to 65°C. Ideally, the rack/chassis shall reside in an indoor climate-controlled environment. Additionally, if a 19” server chassis is utilized, adequate airflow through the chassis and clearance of at least 6 inches (153mm) from the front doors of the chassis must be ensured.
Do not install the Onyx FHM where the relative humidity of the surrounding air can exceed 95% or where it will be exposed to falling or dripping water or other liquid contaminates.
To best ensure long-term performance of the Onyx FHM, install the device in a location with minimal dust in the environment, or where dust mitigation (air filtering) is present.
Common Installation Tools
Adjustable Torque Driver
#2 Phillips Driver Bit
Percussion Drill or
4mm Concrete Drill Bit 2mm / 4mm HSS Drill Bit 3/8-Inch HSS Drill Bit
Level bar
10mm Wrench
#2 Phillips-Head Screwdriver
Hydraulic Crimping Tool
Wire Stripper capable of 6 AWG and 14 AWG wire
Other Required Items (Installer to Provide)
A length of 6-AWG Green/Yellow to terminate to the Onyx FHM Grounding Lug. Terminated end shall have 0.5 +/- 0.02 inch (12.7 +/- 0.5 mm) of insulation removed.
Stripped 6-AWG Wire Details
Connecting Earth Ground
Grounding of the chassis is required prior to powering the unit. Grounding is required to reduce or prevent the risk of shock hazards, equipment damage, and the potential of data corruption.
A grounding lug, M4 screws, and washers are provided with the package contents, however, the grounding wire is not included. For convenience, there are two locations on the case in which the grounding lug may be fixed.
The following instructions are for grounding the equipment:
CAUTION: This equipment must be grounded. Do not defeat the ground conductor or operate the equipment without correctly grounding the equipment. If there is any uncertainty about the integrity of the equipment's grounding, please contact your local electrical inspection authority or a certified electrician.
Before grounding the equipment, ensure that the rack is properly grounded and in compliance with local regulatory guidelines. Ensure that there is nothing that can obstruct the connection for grounding and remove any paint or materials that may prevent good grounding contact.
Strip 0.5” +/-0.02” (12.7mm +/-0.5mm) of insulation from a size #6 AWG green and yellow grounding wire of adequate length to reach the rack or other grounding terminal block. Note that this wire is not provided with the installation kit.
Insert the exposed grounding wire all the way into the barrel of the grounding lug that is provided in the installation kit.
Using a crimping tool or a crimping tool with dies sized for a #6 AWG Grounding Lug, deform the barrel of the lug such that the stripped wire is contacted, compressed and secured in place.
Typical Crimping of 2-Hole Grounding Lug
After crimping, firmly grasp the 2-Hole Grounding Lug and pull on the wire to ensure adequate crimp and retention of the wire into the connector.
Locate the designated location for securing the grounding lug on the right side of the Onyx FHM. This area is free of paint and has threaded holes sized for the included M4, 8mm Long Screws.
Insert 2 pcs. of the M4, 8mm Long screws through 2 pcs. of the M4 Star Washers that are provided with the Onyx FHM.
Insert screws through the 2 holes of the crimped Grounding Lug and install additional 2 pcs. (1 Each) of M4 Star Washers provided with the Onyx FHM onto the M4 screws behind the crimped Grounding Lug, as shown in the following figure.
Hardware Arrangement for Grounding Lug
Thread the assembled 2 pcs. of the M4, 8mm Long Screws, 4pcs. of the M4 Lock Washers and Grounding Lug into the threaded holes on the right side of the Onyx FHM and secure as shown in Figure: Grounding Lug Installation onto the Onyx FHM.
Grounding Lug Installation onto the Onyx FHM
Torque the M4, 8mm Long Screws fastening the Grounding Lug to the Onyx FHM to 20 in-lbs. (2.3 Nm) +/- 10% using a #2 Phillips Bit and Torque Driver.
Grounding Lug Installation Details
Rack Chassis Mounting
The Onyx FHM is typically installed in an EIA 19-inch rack or chassis. The following steps detail this installation application.
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%.
Installation of Rack Mount Brackets (Front Mount)
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.
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.
Install and torque rack/chassis mounting screws per the rack/chassis manufacturer’s specifications.
Installation of Mounting Screws
Alternative Rack Installations
Wall Mounting
The Onyx FHM can also be mounted on a wall. If wall mounting of the product is preferred, please follow the following steps for installation.
Place the rack mount bracket onto the left or right side of the equipment in the orientation shown below. Align the holes of the rack mount bracket with the holes provided on the right and left side of the case. It is suggested to use the threaded hole pattern located at the center of the front-to-back edge to balance the wall-mounted unit.
Wall Mounting – Rack Mount Bracket Orientation
Insert and secure the rack mount bracket using 4 pcs. of the M4, 6.5mm Long Screws provided with the rack mount bracket. Torque the M4 Screws to 20 in-lbs. (2.3 Nm) +/- 10% using a #2 Phillips Bit and Torque Driver.
Repeat Steps 1 and 2 for second rack mount bracket on opposite side of the Onyx FHM.
Determine which direction the ports of the Onyx FHM should be facing on the wall for most efficient routing to related equipment. The front and back faces of the unit should face either left or right when wall mounting the Onyx FHM. The rack mounting brackets should be directly above and below the unit.
Holding the Onyx FHM in the position and orientation desired on the wall, use a pencil or marker to mark the 4 obround holes of the rack mounting brackets on the wall. Once marked, remove the unit and set aside.
Using a 6mm Drill Bit and a Drill Driver (plaster/lathe or drywall) or Percussion Drill (concrete), drill 30mm deep holes into wall at center of marked locations.
Insert 4 pcs of 6mm Diameter, 25mm Long Plastic Anchors included with the unit into the 6mm holes drilled into the wall. Insertion may require light tapping of the anchor using a hammer.
Hold the Onyx FHM on the wall aligning the obrounds of the mounting brackets with the holes and insert 4 pcs. of the M4, 25mm Long Screws through the mounting bracket and into the anchors (see Figure: Insertion of Wall Anchors and Screws to Mount Onyx FHM). Tighten M4 Screws until flush with the mounting bracket and tighten no more than 1 additional revolution.
Insertion of Wall Anchors and Screws to Mount Onyx FHM
Completed Wall Installation (Alternate Orientations)
Applying Power
The following sections detail the installation of the field replaceable power supply units (PSU) and the connection to the AC Line to power the Onyx FHM.
WARNING: The AC Line of the Onyx FHM can present dangerous voltage. Contact with the line voltage can result in pain or injury.
1. Verify that the chassis ground of the Onyx FHM is connected to an earth ground before connecting AC Power Cable to the Onyx FHM unit.
2. Verify that the AC Line has a quality signal ground integrated with a circuit breaker prior to applying AC Line Power to the Onyx FHM.
3. Ensure that line voltage is not present when plugging the AC Power Cable to the PSUs of the unit. Only plug units into AC Line voltage after they are connected to the Onyx FHM.
The PSUs are pre-installed in the Onyx FHM. The PSU is a hot swappable field replaceable unit (FRU) and can be replaced while the equipment is operating if the remaining (second) PSU is installed and in operation.
The following instructions detail how to install a new PSU field FRU in the Onyx FHM.
PSU Replacement
WARNING: Shock hazard! For safety, disconnect power input cable from the power supply unit before servicing the equipment.
PSU FRU Removal
Locate the release tab on the PSU FRU and press and hold the blue release tab to the right to unlock the PSU from the power bay.
While holding down the release tab, grip the PSU's handle and firmly pull it out of the power bay.
PSU FRU Removal
PSU FRU Installation
Align the new PSU with the empty power bay, ensuring the PSU’s power connector is in the correct orientation (see Figure 24).
Carefully slide the new PSU into the power bay and gently push until the front surface of the PSU is flush with the front surface of the case.
An audible click will be heard when the PSU is installed correctly. The PSU will not go in all the way if it is inserted in the wrong orientation.
CAUTION: If the insertion of the PSU results in either significant resistance or a hard stop, remove the PSU and inspect it for correct orientation and/or damage. If damage is found or insertion issues persist, contact your supplier for replacement of the PSU. Do not attempt to repair a damaged PSU.
PSU FRU Installation
Connection of AC Power
Ensure there is enough power available on the selected electrical circuit to supply the Onyx FHM. The maximum system power consumption is 188.22 watts with an input voltage of 100-240V AC. It is recommended to ensure that enough power is available from the power distribution system prior to installation.
The Onyx-FRU is designed to support 1 + 1 power redundancy. Ensure that both PSU FRUs have been properly installed before powering up the equipment.
Insert the AC PSU Cable Receptacle of 1 pc. of the included power cords into the AC PSU ensuring that it is fully inserted.
Insert the standard AC Plug into the desired AC outlet. If necessary, switch on power strip that PSU(s) are plugged into.
Verify that the power supply is operating. The LED on the PSU will illuminate Green designating normal operation.
Installing the AC Power Cord into the PSU FRU
Verifying System Operation
Front Panel LEDs
Verify successful boot up of Onyx FHM by checking the system LED Tree located on the front panel. When operating normally, the PWR, FAN, and SYS LEDs should all display green.
Onyx FHM Front Panel LED Tree — GNSS
Onyx FHM Front Panel LED — GNSS
Off
GNSS is not configured. NOTE: Need NOS to activate this feature.
Solid Green
GNSS is in normal state. Self-survey is complete. NOTE: Need NOS to activate this feature.
Blinking Green
GNSS is in learning state. Self-survey is not completed. NOTE: Need NOS to activate this feature.
Solid Yellow
Power up. GNSS is not tracking any satellite. NOTE: Need NOS to activate this feature.
Blinking Yellow
GNSS Antenna is shorted to ground. NOTE: Need NOS to activate this feature.
Onyx FHM Front Panel LED — SYNC
Off
System timing synchronization is disabled, or unit is in free-run mode. NOTE: need NOS to activate this feature.
Solid Green
System timing core (1588 and SyncE) is synchronized to external timing source (ex: GNSS, 1PPS, PTP, BITS, etc.) NOTE: need NOS to activate this feature
Blinking Green
System is synchronized in SyncE mode.
NOTE: need NOS to activate this feature.
Solid Yellow
System timing core is in acquiring state or holdover mode.
Blinking Yellow
System timing synchronization failed.
NOTE: need NOS to activate this feature.
Onyx FHM Front Panel LED — SYS
Off
Reserved
Solid Green
System boot complete
Blinking Green
Reserved
Solid Yellow
Reserved
Blinking Yellow
System boot not complete
Onyx FHM Front Panel LED — FAN
Off
Reserved
Solid Green
All FAN Modules Operating Normally
Blinking Green
Reserved
Solid Yellow
Reserved
Blinking Yellow
One or more FAN module(s) have failed or no FAN module present
Onyx FHM Front Panel LED — PWR
Off
No power or in shutdown mode.
Solid Green
System power good & BMC is present & BMC power good
Solid Yellow
System power good & BMC is absent
Onyx FHM Front Panel LED — ID
Off
No Power
Blinking Blue
Beacon feature is enabled
Onyx FHM Front Panel LED — PSU FRU LED
Off
No AC power input to this PSU.
Flashing Red
No DC power output from this PSU.
Flashing Green
DC present, only standby output on. Poor contact.
Green
PSU DC output ON and OK.
Red
PSU failure.
Alternating Flashing Green and Red
Warning. Working conditions are not satisfied. Please check the voltage, electric current, and temperature.
Onyx FHM Management Port LED — Left LED
Off
1G no link
Solid Green
1G link-up
Blinking Green
1G TX/RX activity
Onyx FHM Management Port LED — Right LED
Off
No activity
Solid Amber
10M/100M link-up
Blinking Amber
10M/100M TX/RX activity
Post Installation Steps
After installing the FHM, connect the RUs to it, starting with port 0.
Ensure all RUs are of the same model.
Onboard the FHM.
Refer to 5G Onyx Portal Operations Guide > Add FHM.
Appendix: Regulatory Compliance
Federal Communications Commission (FCC) and Innovation, Science and Economic Development (ISED) – Canada compliance information is provided in the following topics.
FCC Statement
This equipment complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
This equipment may not cause harmful interference.
This equipment must accept any interference received including interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the
WARNING: This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance 33 inches (83 cm) between the radiator and your body.
CAUTION: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate this equipment.
ISEDC Compliance
This equipment complies with Innovation, Science and Economic Development Canada licence exempt RSS standard(s). Operation is subject to the following two conditions: (1) this equipment may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device.
CAN ICES-003(A)/NMB-003(A)
The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 33 inches (83 cm) from all persons and must not be collocated or operating in conjunction with any other antenna or transmitter, End-Users must be provided with transmitter operation conditions for satisfying RF exposure compliance.
Last updated
Was this helpful?