Condition: Used — in working condition.

The Viavi (JDSU) 4126 MA FC-S-PM is a singlemode OTDR module featuring a built-in power meter and source, with Fiber Complete software. It operates at 1310/1550 nm and is suited to metro access, FTTH, and short/medium-haul qualification testing, including FTTH networks up to 1x32 splitter configurations. Key specifications include:

• Wavelengths: 1310 / 1550 nm
• Dynamic Range: 40/38 dB
• Connector: APC-SC
• Event Dead Zone: 0.9 m
• Attenuation Dead Zone: 4 m
• Range: 260 km
• Network Type: FTTH / Access / Metro
• Applications: Short/medium-haul qualification, FTTH test up to 1x32 splitter
• Built-in Power Meter & Source
• Fiber Complete software included

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) 4126 MA is a metro access singlemode OTDR module designed for use with compatible Viavi MTS/T-BERD modular test platforms. It delivers high dynamic range performance at both 1310 and 1550 nm, making it well suited to FTTH qualification, metro access network characterisation, and short-to-medium-haul fibre testing. The integrated power meter and source (FC-S-PM variant) allows full loss test set functionality without additional modules, and the included Fiber Complete software provides automated pass/fail analysis and comprehensive reporting.

Key Features:
• 40/38 dB dynamic range at 1310/1550 nm
• Built-in optical power meter and source for integrated loss measurement
• 0.9 m event dead zone for precise short-range fault location
• Supports FTTH/access/metro network architectures
• FTTH testing up to 1x32 passive splitter
• APC-SC connector interface
• Fiber Complete software for automated analysis
• Field-replaceable module compatible with Viavi MTS/T-BERD platforms

Specifications:
Wavelengths: 1310 / 1550 nm
Dynamic Range: 40 / 38 dB
Event Dead Zone: 0.9 m
Attenuation Dead Zone: 4 m
Maximum Range: 260 km
Connector: APC-SC
Network Type: FTTH / Access / Metro
Applications: Short/medium-haul qualification, FTTH up to 1x32 splitter

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.