... Meter is specially designed for PON network construction and maintenance which can be connected between OLT and ONT. The voice, data, video ... ’s a useful site test tool for the engineers of PON network and maintenance operators. Main features--Handheld, easy to ... operate--Can test 3 wavelengths' power of PON system synchronously: 1490nm, 1550nm, 1310nm--Can test the burst mode ...