English
Product Model:
ESP312X-40D(I)Data Rate:
25GWavelength:
1310nmDistance:
40KMConnector:
LCFiber Type:
SMDDM:
YesProduct Origin:
ChinaShipping Port:
ShenzhenGoods Stock:
100
FAQ:
Q1: What is a 25G SFP28 transceiver?
A1: 25G SFP28 transceiver is a compact, hot-pluggable optical module that supports 25Gbps data transmission over fiber or copper cables. It is widely used in data centers, telecom networks, and enterprise networks.
Q2: What are the key differences between SFP28 and SFP+?
A2: SFP28 supports 25Gbps speeds, while SFP+ supports 10Gbps. SFP28 is backward-compatible with SFP+ ports but requires appropriate configuration for optimal performance.
Q3: What distance can a 25G SFP28 SR transceiver cover?
A3: The 25G SFP28 SR (Short Reach) module typically supports up to 100 meters over OM4 multimode fiber (MMF).
Q4: Can 25G SFP28 modules work in 10G switches?
A4: Yes, most 25G SFP28 modules are backward-compatible with 10G SFP+ ports, but they will operate at 10Gbps speeds.
Q5: What are the common types of 25G SFP28 transceivers?
A5: SR (Short Reach) – Up to 100m over MMF
LR (Long Reach) – Up to 10km over SMF
ER (Extended Reach) – Up to 40km over SMF
Copper (DAC/AOC) – Short-distance direct attach solutions
Q6: What are the typical applications of 25G SFP28 transceivers?
A6: Data center spine-leaf architecture
5G fronthaul/midhaul networks
High-performance computing (HPC) clusters
Enterprise network upgrades from 10G to 25G
Q7: What is the wavelength of a 25G SFP28 LR transceiver?
A7: The 25G SFP28 LR module typically operates at 1310nm wavelength, optimized for single-mode fiber (SMF) transmissions up to 10km.
Q8: How does 25G SFP28 compare to 100G QSFP28 in cost and performance?
A8: 25G SFP28 is more cost-effective for short-to-medium distances (≤10km), while 100G QSFP28 suits high-density 100G deployments.
Q9: Do 25G SFP28 modules support DDM/DOM monitoring?
A9: Yes, most MSA-compliant modules include Digital Diagnostics Monitoring (DDM/DOM) for real-time performance tracking.
Q10: What’s the future of 25G SFP28 with 50G/100G adoption?
A10: 25G remains relevant for cost-sensitive upgrades, especially in 5G fronthaul and enterprise edge networks, despite higher-speed alternatives.
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Compatible with IEEE 802.3bj and IEEE 802.3cd Supports aggregate data rates of 400Gbps(PAM4) Optimized construction to minimize insertion loss and cross talk Pull-to-release slide latch design 28AWG through 30AWG cable Straight and break out assembly configurations available Customized cable braid termination limits EMI radiation Customizable EEPROM mapping for cable signature RoHS compliant FAQ: Q1: What is a DAC Cable (Direct Attach Copper Cable)? A1: A high-speed DAC cable is a cost-effective solution for short-distance data transmission, commonly used in data centers, cloud computing, and enterprise networking to connect switches, servers, and storage devices. Q2: What are the advantages of using DAC cables over optical transceivers? A2: Passive DAC cables are more affordable, consume less power, and offer lower latency than active optical cables (AOC) or fiber optics, making them ideal for 10G, 25G, 40G, and 100G Ethernet connections. Q3: What lengths are available for SFP+ DAC, QSFP+ DAC, and QSFP28 DAC cables? A3: Standard lengths range from 0.5m to 7m, with popular options like 1m DAC, 3m DAC, and 5m DAC cables for rack-to-rack connectivity. Q4: Are DAC cables compatible with Cisco, HPE, Juniper, Dell, and Arista devices? A4: Most SFP DAC and QSFP DAC cables are vendor-agnostic, but always verify compatibility with your switch or server model for seamless integration. Q5: Can high-speed DAC cables support 400G Ethernet? A5: Yes, QSFP-DD DAC and OSFP DAC cables now support 200G/400G data rates, ideal for hyperscale data centers and HPC (High-Performance Computing). Q6: Do passive DAC cables require external power? A6: No, passive copper DAC cables draw power directly from the device, reducing energy costs and heat dissipation in data center environments. Q7: What is the maximum distance for DAC cable transmission? A7: Copper DAC cables typically reach up to 7m—beyond this, consider active DAC cables or AOC/fiber optics for longer distances. Q8: Are DAC breakout cables hot-swappable? A8: Yes, hot-swappable DAC cables (e.g., QSFP+ to 4x SFP+ DAC) allow flexible deployment without system downtime. Q9: How to choose the right DAC cable for 10G/40G/100G networks? A9: Match your switch port type (SFP+, QSFP+, etc.), data rate, and length requirements. For high-density setups, opt for low-profile DAC cables. Q10: What is the difference between passive DAC and active DAC cables? A10: Passive DAC cables rely on device power and support shorter distances (up to 7m), while active DAC cables include signal amplification for extended reach (up to 15m) but consume more power.
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