10G SFP+ ZR++ 1550nm 120km

Q: What are the differences between 10G DAC high-speed cables, 10GBase-T (Ethernet) modules, and 10G SFP+ (optical) modules?

A: While all three—10G DAC high-speed cables, 10GBase-T modules, and 10G SFP+ modules—operate at the same transmission speed, they differ in several aspects:

Backward Compatibility: 10G DAC high-speed cables do not support backward compatibility with Gigabit switches, being designed exclusively for connections between 10 Gigabit Ethernet switches. Conversely, 10GBase-T modules are compatible with standard copper networking devices.

Latency: As mentioned previously, 10GBase-T modules have a latency of approximately 2.6 microseconds, whereas 10G SFP+ optical modules exhibit a latency of around 300 nanoseconds. 10G DAC cables offer latency within this range, around 0.3 to 1.8 microseconds, which is lower than that of 10GBase-T modules.

Transmission Distance: Compared to 10GBase-T modules, 10G DAC high-speed cables have a much shorter maximum transmission distance of only 10 meters. This limitation significantly curbs power consumption and latency, making them ideal for intra-rack and inter-rack wiring connections.

Cable Types: 10G DAC high-speed cables incorporate twisted pair conductors for signal transmission. In contrast, 10GBase-T modules use Ethernet cables, and 10G SFP+ modules employ fiber optic cables.

Cost: Although 10GBase-T modules, which typically leverage inexpensive Ethernet cabling, are less costly than 10G SFP+ optical modules, it’s important to note that the prices of single-mode and multi-mode 10G SFP+ modules vary based on wavelength and transmission distance. For instance, industrial-grade 10GBase-T modules can be more expensive than their optical counterparts. However, 10G DAC high-speed cables are generally the more affordable option; for example, FiberStore (FS) offers a 1-meter 10G DAC cable starting at 81 yuan, whereas a 10GBase-T module costs at least 480 yuan.

Q: What is the interface type for 10G SFP+ optical modules?

A: 10G SFP+ optical modules adopt the LC interface, a compact fiber optic connector compatible with both single-mode and multi-mode fiber.

Q: How does a 10G SFP+ optical module ensure compatibility with different devices?

A: Compliant with industry standards such as IEEE 802.3ae and SFF-8431, 10G SFP+ modules facilitate interoperability across devices from various manufacturers. Nevertheless, checking the device compatibility list before usage is advisable.

Q: What are the digital diagnostic features of 10G SFP+ optical modules?

A: Equipped with DDM (Digital Diagnostics Monitoring), SFP+ modules enable real-time monitoring of temperature, voltage, transmitted and received optical power, facilitating fault detection and maintenance.