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).