Condition: Used — In working condition. These are module-only units with no mainframe included. All units have been tested and confirmed working.

The Viavi JDSU 8126B is a singlemode OTDR module supporting dual-wavelength testing at 1310 nm and 1550 nm, with a dynamic range of 41/40 dB and a measurement range of up to 400 km. The PC connector interface and extremely short event dead zone of 0.65 m make it suitable for demanding fibre characterisation tasks.

Included in the sale:
• Viavi 8126B SM OTDR Module (1310/1550 nm, 41/40 dB, PC connector)

Key specifications of this unit:
• Source Wavelengths: 1310/1550 nm
• Dynamic Range: 41/40 dB
• Connector: PC
• Event Dead Zone: 0.65 m
• Attenuation Dead Zone: 2 m
• Range: 400 km

Please note that we have multiple units in stock, and the images presented are of one of them, therefore the cosmetic condition of the exact item you will receive may slightly differ.

The Viavi (formerly JDSU) 8126B is a singlemode OTDR module from the 8100 Series, designed for use with compatible Viavi MTS and T-BERD mainframe platforms. It is built for the installation, commissioning, and maintenance of long-haul singlemode fibre optic networks, trunk routes, and metro networks. The module supports dual-wavelength testing at 1310 nm and 1550 nm, offering a dynamic range of 41/40 dB respectively, enabling accurate characterisation of fibre spans up to 400 km.

With an exceptionally short event dead zone of 0.65 m and an attenuation dead zone of 2 m, the 8126B is well suited to dense fibre installations where close event resolution is critical. The PC connector interface provides reliable performance during installation and maintenance testing.

Key Specifications:
Wavelengths: 1310 nm / 1550 nm
Dynamic Range: 41 dB (1310 nm) / 40 dB (1550 nm)
Event Dead Zone: 0.65 m
Attenuation Dead Zone: 2 m
Measurement Range: Up to 400 km
Connector Type: PC
Fibre Type: Singlemode
Platform Compatibility: Viavi MTS / T-BERD 8100 Series mainframes

Please refer to the Viavi manufacturer website for full specifications and compatibility information.

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.