1.25G BIDI SFP ZX 1490Tx 1550Rx 80km

Q、What types of SFP optical modules are there?

A、SFP optical modules are small form-factor pluggable, hot-swappable transceiver modules widely used in the telecommunications industry. They come in various types, including BIDI-SFP, electrical interface SFP, CWDM SFP, DWDM SFP, and SFP+ optical modules. Furthermore, compared to similar types like XFP, X2, and XENPAK optical modules, SFP modules not only connect directly but also offer a cost advantage due to their lower prices.

Q、What is the difference between SFP+ and SFP optical modules?

A、SFP and SFP+ optical modules have nearly identical sizes, with the primary distinction lying in their transmission rates. SFP modules have a maximum transmission speed of 2.5Gb/s, whereas SFP+ modules operate at 10Gb/s. Consequently, their applications and transmission distances vary due to these differing speeds.

Q、Can SFP+ optical modules be used in SFP ports?

A、Yes, it is possible. A 10G SFP+ optical module can operate when inserted into an SFP port, albeit at a reduced transmission rate of 1Gbps. Conversely, SFP modules cannot be utilized in SFP+ ports.

Q、What is the difference between the electrical interface module SFP-GE-T and optical interface modules?

A、Electrical interface module SFP-GE-T and optical interface modules differ in their signal transmission methods and applicable environments:

• Signal Transmission: Electrical interface modules use electrical signals, while optical interface modules employ optical signals for transmission. Optical signal transmission provides greater bandwidth and speed, making it suitable for long-distance transmission.
• Application Environment: Electrical interface modules are fit for short-range transmission and smaller network settings such as offices or home networks. Optical interface modules are designed for large-scale network environments like data centers and corporate networks.

Q、Can gigabit electrical interfaces interoperate with 100Mbps electrical interfaces? Can gigabit electrical interfaces interoperate with 10Gbps electrical interfaces?

A、Gigabit and 100Mbps electrical interfaces can interoperate directly, but the data transfer rate is limited to the slower speed. When a gigabit interface connects with a 100Mbps interface, the transmission rate is restricted to Fast Ethernet’s rate.

Interoperability between gigabit and 10Gbps electrical interfaces requires additional equipment, such as switches. With a switch facilitating the connection, gigabit and 10Gbps interfaces can interoperate, yet the speed is still constrained by the slower interface. Note that this interconnectivity assumes that the 10Gbps port on the network device using the electrical interface module supports gigabit rates.