Communication Products / Digital Equipment (Digital Television Set-Top Box, Satellite TV Receiver), optical fiber Transmission Equipment (optical fiber communication System Platform, 1550nm External Modulation Laser Transmitter, Erbium-Doped fiber Amplifier, 1310nm Laser Transmitter, optical Relay Station, Field optical Receiver), Cable Transmission Equipment (Trunk Bilateral Amplifier, optical Passive Device, Magnetic Saturation Barostat, Coaxial Cable).