The SIL-08-10-B127-40XD is a 10Gbps Singlemode BiDi (Bi Directional) SFP module.
SilverNet BiDi SFP modules transmit and receive signals on different wavelengths and should be bought in pairs. This ensures that you can link two BiDi SFPs with complementary wavelengths. For instance, if a TX1270/RX1330nm BiDi SFP is used at one end, a TX1330/RX1270nm (SIL-08-10-B133-40XD) BiDi SFP must be used at the opposite end.
The SIL-08-10-B127-40XD modules can support data rates of up to 10Gbps and cover distances up to 40km. They adhere to the SFP MSA specifications and can operate within a temperature range of 0 to +70°C.