Condition: Refurbished

This Viavi OneExpert ONX-580 is a seller-refurbished unit with a calibration expiry of March 2026, making it ready for immediate field deployment. It is a comprehensive copper and DSL access network tester supporting the full range of broadband technologies with an extensive suite of licensed options.

Active licensed options on this unit:
• Bluetooth
• DSL Bonded
• G.fast
• Broadcom
• HPNA
• IP Video
• Mobile
• Resistive Fault Locator
• Transmission Impairments
• TrueSpeed
• V35B Profile
• VoIP
• VoIP MOS

Included in the sale:
• Viavi OneExpert ONX-580 unit (as pictured)

No additional accessories or leads are supplied.

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 comprehensive copper and DSL access network test solution designed for telecommunications field engineers and service providers. It combines advanced broadband testing, fault location, and service qualification into a single handheld platform, supporting the full range of DSL technologies including ADSL, VDSL2, G.fast, and bonded variants.

The ONX-580 enables technicians to qualify, install, and troubleshoot copper access lines with confidence, offering end-to-end service testing from the central office to the customer premises. Its TrueSpeed capability allows accurate throughput testing that reflects real-world customer experience, while the integrated Resistive Fault Locator speeds up copper fault diagnosis in the field.

Key Specifications:
Platform: OneExpert ONX-580
DSL Technologies Supported: ADSL, ADSL2+, VDSL2, G.fast, Bonded DSL
Copper Testing: Resistive Fault Location, TDR, single-ended line testing
Throughput Testing: TrueSpeed (RFC 6349-based)
VoIP Testing: VoIP MOS scoring
Video Testing: IP Video quality analysis
Transmission Testing: Transmission Impairments
Connectivity: Bluetooth
Additional Protocols: HPNA, Broadcom
Form Factor: Handheld, battery-powered field instrument
Display: Colour touchscreen
Manufacturer: Viavi Solutions (formerly JDSU)

The ONX-580 is widely used by telecoms operators, network contractors, and DSL service providers for broadband installation qualification, in-service fault diagnosis, and customer experience verification across copper and hybrid access networks.

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.