The Viavi (formerly JDSU) 4126 LM is a last-mile singlemode OTDR module designed for use with compatible Viavi MTS/T-BERD modular platforms. It is optimised for FTTx distribution and drop cable verification, short-haul premises network construction, and point-to-point feeder fibre characterisation.
Key Features:
• 34/32 dB dynamic range at 1310/1550 nm
• High resolution and short dead zone for distribution fibre qualification
• Instantaneous traffic detection when connecting to live fibre
• First-to-market OTDR integrating a true Loss Test Set function
• In-service testing at dedicated wavelengths (1625 or 1650 nm)
• Automated bend detection
• Field-replaceable without tools
• Compatible with Triple-Play, xDSL, Copper, and PON power meter modules
Specifications:
Wavelengths: 1310 / 1550 nm
Dynamic Range: 34 / 32 dB
Event Dead Zone: 1 m
Attenuation Dead Zone: 4 m
Connector: SC
Fibre Type: Singlemode
Applications:
• Short-haul and premises network construction and maintenance
• Point-to-point (P2P) FTTx feeder fibre characterisation
• FTTx distribution and drop cable verification and continuity checking