2 channels PCM Voice Telephone over Fiber Optic with 10-100Mbps Ethernet Extender

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2 channels PCM Voice Telephone over Fiber Optic with 10/100Mbps Ethernet SC Singlemode fiber,working distance up 20Km (40Km/60Km/80Km optional). SC optical interafce (FC/ST/LC optional).High quality and reliable….