JRC JUE-500 FleetBroadband FB500 – Marine Satellite Broadband Communication System

The JRC JUE-500 is an Inmarsat FleetBroadband FB500 marine satellite communication system developed by Japan Radio Co., Ltd. for high-speed ship-to-shore voice and data communication.

JRC documentation confirms that the JUE-500 supports Standard IP data up to 432 kbps and Streaming IP up to 256 kbps, while allowing simultaneous voice and broadband-data communication. It also supports e-mail, fax and SMS messaging.

The product image provided shows a JRC FB500 antenna/radome together with the associated below-deck communication terminal.

Product Information

Manufacturer: Japan Radio Co., Ltd. (JRC)
Country of Origin: Japan
Model: JUE-500
Service: Inmarsat FleetBroadband FB500
Product Type: Marine Satellite Broadband / Mobile Earth Station
Marine Application: Ship-to-shore voice, internet, e-mail, fax, SMS, remote monitoring and data communication
Status: Legacy / Discontinued JRC model
Successor: JRC JUE-501

JRC confirms that the JUE-500 entered service in 2009 and was later succeeded by the JUE-501, which offered reduced size/weight and enhanced networking functions.

What Is the JRC JUE-500?

The JUE-500 is a vessel-mounted FleetBroadband terminal designed to provide broadband connectivity through Inmarsat's satellite network.

It was built for applications such as:

• Internet and e-mail
• Voice communication
• Fax
• SMS
• Crew communications
• Electronic chart and weather updates
• Secure company-network access
• Large file transfer
• Vessel and engine telemetry
• Videoconferencing
• Remote equipment monitoring

JRC's original brochure specifically lists these applications for the JUE-500.

JUE-500 Main Features

• FleetBroadband FB500 service
• Standard IP up to 432 kbps
• Streaming IP up to 256 kbps
• Simultaneous voice and high-speed data
• 160-character SMS support
• Fax and e-mail capability
• Three-axis stabilized antenna design
• No external gyro or GPS input required for antenna tracking
• Single coaxial cable between antenna and below-deck terminal
• Ethernet, ISDN and telephone connectivity
• Optional interface unit for expanded vessel integration
• Suitable for vessel telemetry and remote maintenance

The single-coax architecture was designed to simplify installation between the antenna and below-deck equipment.

Main Technical Specifications

Model: JUE-500
Transmit Frequency: 1626.5–1660.5 MHz
Receive Frequency: 1525.0–1559.0 MHz
Standard IP Data: Up to 432 kbps
Streaming IP: Up to 256 kbps
Voice: 4 kbps
Audio: 64 kbps for fax / analogue modem
ISDN: 56/64 kbps
Antenna Type: 54 cm flat antenna
Polarization: Right-hand circular
Power Input: 19–31 VDC
Optional AC Supply: 100/110 or 220 VAC via external PSU
Antenna Operating Temperature: -25°C to +55°C
Below Deck Unit Temperature: -15°C to +55°C
Relative Humidity: 0–95%, non-condensing
Operational Wind: Up to 100 knots
Ship Headway: Up to 30 knots

These specifications are published in JRC's official JUE-500 brochure.

Main JUE-500 Components

JRC's official system documentation identifies the main equipment as:

GSC-501 – Above Deck Equipment / Antenna
Approximate mass: 22 kg

GSC-502 – Below Deck Equipment / Main Unit
Approximate mass: 2.2 kg

NQW-267 – Handset
Approximate mass: 0.5 kg

Important optional components include:

NQA-1722 – Option Interface Unit
NBD-577C – Power Supply Unit
NQE-8035B – Telephone Junction Box

The standard system package also included cables, manuals, software CD, installation parts, spare parts and SIM-card case.

FleetBroadband Antenna System

The JUE-500 uses JRC's stabilized antenna technology with a three-axis control arrangement.

The antenna does not require external gyro or GPS data for normal satellite tracking, and JRC designed the antenna arrangement to avoid cable twisting during continuous satellite tracking.

The official antenna dimension is approximately 630 mm diameter × 683 mm high for the GSC-501 above-deck equipment.

Communication Interfaces

The JUE-500 can support a wide range of shipboard communication connections.

Typical interfaces include:

• Ethernet
• ISDN
• Telephone lines
• Fax
• USB
• SIM card
• Handset
• Optional external buzzers
• GPS signal input/output via optional interface arrangement
• NMEA gyro interface through optional interface equipment

JRC specifies an optional interface unit supporting four RJ11 telephone lines and additional vessel interfaces.

Marine Applications

The JRC JUE-500 can be used aboard:

• Cargo Ships
• Bulk Carriers
• Container Ships
• Oil & Chemical Tankers
• LNG/LPG Carriers
• Offshore Vessels
• Passenger Ships
• Survey Vessels
• Merchant Ships

Typical use includes ship-office connectivity, weather and chart downloads, crew communication, telemetry and remote technical monitoring.

Important JUE-500 GPS Week Number Rollover Issue

This is particularly important for any vessel still operating a JUE-500.

JRC issued an official notice stating that the JUE-500 was affected by a GPS Week Number Rollover on 8 September 2024.

JRC states that affected units can fail to complete registration with the Inmarsat network, resulting in loss of communication, and the internal clock/log date may reset. The manufacturer's countermeasure is a software upgrade.

Therefore, any JUE-500 being returned to service should have its software version checked before installation or shipment.

Common Problems & Troubleshooting

JUE-500 Cannot Register to Inmarsat Network

If the equipment previously worked but will no longer register, first check the software version because of the documented 2024 GPS Week Number Rollover issue. JRC specifically identifies software updating as the corrective action.

Antenna Does Not Track Satellite

Check:

• GSC-501 antenna power
• Coaxial cable
• Antenna control electronics
• BDE status
• Cable connectors
• Physical obstructions around the antenna

No Internet / Data Communication

Check SIM/service activation, network registration, Ethernet connections and BDE configuration.

Voice Works but Data Does Not

Inspect LAN configuration, network settings and FleetBroadband service status.

No Voice Communication

Check handset, telephone interface, service status and relevant BDE connections.

No Power

Inspect ship's DC input or optional NBD-577C power supply, fuses, connectors and BDE input.

Intermittent Communication

Inspect coaxial connectors, antenna obstruction, water ingress and vessel network connections.

Ethernet Port Not Working

Check Ethernet cable, network configuration and BDE communication settings before replacing internal electronics.

Maintenance Tips

• Check JUE-500 software version and rollover update status.
• Inspect the antenna radome for cracks or damage.
• Check antenna mounting and coaxial cable.
• Inspect GSC-502 ventilation and connectors.
• Test Ethernet and telephone interfaces periodically.
• Check FleetBroadband registration before sailing.
• Keep all below-deck equipment clean and dry.
• Confirm SIM/service status.
• Back up configuration information before major service.
• Avoid unnecessary antenna disassembly without the appropriate technical documentation.

Spare Parts & Replacement Availability

SM MARINE SERVICE™ can support sourcing of JRC JUE-500 complete systems and individual FleetBroadband spare parts, subject to stock availability.

Typical requirements include:

• Complete JUE-500 FB500 System
• GSC-501 Above Deck Equipment / Antenna
• GSC-502 Below Deck Equipment
• NQW-267 Handset
• NQA-1722 Option Interface Unit
• NBD-577C Power Supply Unit
• NQE-8035B Telephone Junction Box
• Antenna control components
• FleetBroadband modem / processor electronics
• PCBs / electronic boards
• Power components
• SIM-related components
• Ethernet interfaces
• Telephone / ISDN interfaces
• Coaxial cables
• Power cables
• Connectors
• Internal electronic parts

Available equipment can include:

New • Used • Tested Working • Refurbished • Reconditioned

JUE-500 Replacement – JRC JUE-501

The official successor to the JUE-500 is the JRC JUE-501 FleetBroadband FB500.

JRC states that the JUE-251/501 were developed as successors to the JUE-250/500, with reduced equipment size and weight, greater integration and improved networking functionality.

For a failed JUE-500 installation, customers therefore have two possible approaches:

Option 1: Source a compatible JUE-500 replacement unit or spare part.

Option 2: Evaluate retrofit/upgrade to the JUE-501 or another current communication solution.

Compatibility, cabling and FleetBroadband service status should be checked before upgrading.

Why Ships Still Search for JUE-500 Spare Parts

Many vessels were equipped with the JUE-500 as part of their onboard satellite-communications infrastructure.

Replacing only a failed antenna, BDE, PSU or interface unit can sometimes avoid immediate changes to:

• FleetBroadband cabling
• Bridge / radio-room installation
• Telephone interfaces
• Ship LAN connections
• Crew communication arrangements
• Remote monitoring systems

However, because JRC lists the JUE-500 as a discontinued model and because of the documented GPS rollover issue, technical status should be verified carefully before reuse.

Frequently Asked Questions (FAQ)

What is the JRC JUE-500?

The JUE-500 is an Inmarsat FleetBroadband FB500 Mobile Earth Station designed for marine voice and broadband data communication.

What speed does JUE-500 support?

JRC specifies up to 432 kbps Standard IP and up to 256 kbps Streaming IP.

What is the JUE-500 antenna model?

The official above-deck antenna equipment is GSC-501.

What is the below-deck unit model?

The JUE-500 below-deck equipment is GSC-502.

Does the JUE-500 require external gyro input for antenna tracking?

No. JRC states that external gyro or GPS input is not required for the antenna's normal tracking design.

Is JUE-500 discontinued?

Yes. JRC currently lists JUE-500 in its discontinued Inmarsat equipment section.

What replaced JUE-500?

The JRC JUE-501 was developed as the successor to JUE-500.

Does JUE-500 have a known 2024 software problem?

Yes. JRC published a notice concerning GPS Week Number Rollover on 8 September 2024, which can prevent network registration unless the appropriate software countermeasure is applied.

Where can I buy JRC JUE-500 spare parts?

SM MARINE SERVICE™ can support sourcing of JUE-500 antennas, below-deck units, power supplies, interface units and related components, subject to stock.

Can I buy a used or refurbished JUE-500?

Yes. Used, tested working, refurbished and reconditioned equipment can be sourced depending on availability and technical condition.

Short Product Description

JRC JUE-500 FleetBroadband FB500 is a marine Inmarsat satellite communication system providing simultaneous voice and high-speed data, Standard IP up to 432 kbps and Streaming IP up to 256 kbps. Major components include the GSC-501 antenna, GSC-502 below-deck equipment, NQW-267 handset and optional NQA-1722 interface unit. SM MARINE SERVICE™ can support worldwide sourcing of complete JUE-500 systems and spare parts in used, tested, refurbished and reconditioned condition.

User Manual & Technical Resources

???? JRC JUE-500 Official Brochure / Technical Specifications

JRC's official archived brochure includes system configuration, interfaces, dimensions, operating specifications, antenna information and optional components.

Download JRC JUE-500 Official Brochure PDF

???? JRC JUE-500 GPS Week Number Rollover Technical Notice

This official JRC notice is important for all JUE-500 units because it documents the September 2024 registration problem and software-update countermeasure.

JRC JUE-500 GPS Rollover Notice

???? JRC Discontinued Product Support Information

JRC lists the JUE-500 under discontinued marine Inmarsat equipment and provides maintenance/support information for legacy models.

JRC Discontinued Marine Equipment Information

Note: I found the official JRC product brochure and official technical notice, but I did not find a verified public direct-download JUE-500 operator/service manual on JRC's current public site, so I have not inserted an unverified manual link.

SM MARINE SERVICE™

Marine Automation & Navigation Equipment Supplier

Available Condition:
• New Equipment • Used Equipment • Refurbished Equipment • Reconditioned Equipment

Stock Location:
• Bangladesh • China

Services:
• Worldwide Shipping • Technical Support • Spare Parts Supply • Marine Equipment Sourcing

Contact Information
SM MARINE SERVICE™ Samir Market, DT Road, Pahartali, beside CDA Market, Chattogram, Bangladesh
Mobile / WhatsApp / Viber: +88 01818 929292
Email: info@smmarineservice.com
Website: www.smmarineservice.com