A.850nm B.1310nm C.1550nm D.1580nm
A.、傳輸網(wǎng) B.、接入網(wǎng) C.、匯聚網(wǎng) D.、交換網(wǎng)
A.-40~-50VDC B.-40~-57VDC C.-30~-57VDC D.-45~-51VDC