Condition: Used — Good condition overall. Note that the housing around one of the test cable clips is broken; please refer to the images carefully.

The Viavi JDSU OneExpert ONX-580 is a feature-rich DSL field analyser equipped with an extensive suite of licensed test options, making it suitable for a wide range of copper broadband diagnostics and service verification tasks.

Licensed options confirmed active on this unit:
• ADSL
• Bluetooth
• DSL
• Bonded DSL
• FTP/HTTP
• G.fast
• Broadcom HPNA
• IP Video
• Mobile
• Resistive Fault Locator
• Speedcheck
• TDR
• Transmission Impairments
• TrueSpeed
• V35B Profile
• VDSL
• VoIP
• VoIP MOS
• Web Browser
• WiFi

The images provided are of the actual item you will receive. Please review them carefully for the cosmetic condition and what is included in the sale.

The Viavi (formerly JDSU) OneExpert ONX-580 is a field-portable DSL and broadband test solution designed for telecommunications engineers working on the installation, maintenance, and troubleshooting of copper access networks. It combines a wide range of DSL physical layer tests with service-layer verification tools, enabling engineers to qualify lines, locate faults, and validate end-user broadband experience in a single handheld instrument.

The ONX-580 supports testing across all major DSL technologies and is highly configurable through software licence options, allowing operators to tailor the instrument to their specific network requirements. Its TDR capability enables precise cable fault location, while tools such as TrueSpeed and Speedcheck allow accurate measurement of attainable and actual broadband throughput. VoIP MOS scoring, IP Video testing, and WiFi analysis extend its capabilities into service-level verification.

Key Specifications:
Platform: Viavi OneExpert ONX-580
Supported DSL Technologies: ADSL, ADSL2, ADSL2+, VDSL2, G.fast, Bonded DSL
Fault Location: TDR (Time Domain Reflectometry), Resistive Fault Locator
Service Testing: FTP/HTTP throughput, TrueSpeed, Speedcheck
Voice Testing: VoIP, VoIP MOS
Additional: IP Video, WiFi, Web Browser, Mobile, HPNA, Bluetooth, Transmission Impairments
Form Factor: Handheld, field-portable
Display: Colour touchscreen
Connectivity: DSL test leads, Ethernet, WiFi
Manufacturer: Viavi Solutions (formerly JDSU)

Please refer to the Viavi Solutions website for full and current product specifications.

Shipping & Returns Policy

Shipping Policy

• Processing Time: Orders are typically processed and dispatched within 1 business day.
• Shipping Methods: We offer Expedited Shipping to all destinations using UPS/DHL/Fedex/Royal Mail and other reputable carriers.
• Shipping Times: Mainland UK: 1-2 Business Days / Mainland Europe and USA: 2-3 Business Days / Rest of the World 5-7 Business Days.
• Shipping Costs: These are calculated at checkout based on the shipping method, destination and package dimensions.
• CUSTOMS AND TAXES: It is YOUR responsibility to liaise with customs in your country and ensure your package is cleared and any taxes are paid.
• Shipping Destinations: We ship worldwide.
• Tracking: Once your order is shipped, we will provide you with a tracking number via email.
• Insurance: All shipments are insured. In case of damage, please contact us via email within 48 hours of receiving the product with photographic evidence, please also ensure a report is logged with the delivery driver.

Returns Policy

• Return Period: In the event of an item being received which is 'not as specified', you can return your purchase within 14 days of delivery.
• Condition of Items: Items must be returned unused and in their original packaging.
• Return Method: All returns must be notified in writing to hello@ttinstruments.com, the email should accompany the order number, date and reason for return and must be within 14 days of delivery.
• Restocking Fees: A restocking fee of up-to 20% is applicable for items returned for any reason other than 'not as specified'.
• Refund Method: Refunds are processed to the original method of payment within 5 business days of receiving the return.
• Exchanges: We do not offer exchanges. It will either be a replacement or a refund.
• Return Shipping Costs: Return shipping costs will be borne by the customer unless the item is 'not as specified', in this case we will arrange for the return by way of a prepaid shipping label.