"VSUN" telephone optical transceiver through cable direct transmission 1-8 road, 1-16 road, 1-24 road telephone, FXO, FXS way, support for military government units, small and medium-sized companies, electric power, coal mine, highway and some temporary building site edge the customer's phone transmission. The equipment adopts special digital after connect chips powerful, almost all digital logic function of equipment integrated, remarkably raised the product's performance and reduce the cost. This equipment machine with excellent performance, stable and reliable, low power consumption, high level of integration, small volume, easy installation and maintenance.