Viavi JDSU OLP-4057 PON Selective Power Meter 2295/23 for T-Berd MTS-4000 / 2000Condition: Used Very good condition, barely used. NOTE you will need to purchase connectors for the ports. From the manufacturer: JDSU OLP 4057 module adds selective power meter testing capability to the T BERD MTS 2000 and T BERD MTS 4000 platforms for FTTx PON networks turn up and maintenance applications. The ,,trough mode allows simultaneous measurement or 1490nm and 1550nm downstream signals and 1310nm upstream signals without interrupting the