The Hikvision HK-1.25G-20-1550 CCTV accessory is an SFP module for bidirectional data transmission over single-mode optical fiber. It uses an LC connector and operates at a transmit wavelength of 1550 nm and a receive wavelength of 1310 nm, for distances of up to 20 km.
- Type: SFP module
- Data rate: 1.25 Gbps
- Fiber type: Single-mode
- Connector: LC
- Transmit wavelength: 1550 nm
- Receive wavelength: 1310 nm
- Maximum transmission distance: 20 km
- Supply voltage: 3.3 V DC
- Operating temperature: 0–70 °C
- Compatibility: MSA