Cisco CWDM-SFP25G-1270-40 Compatible SFP28 25G CWDM-DOM Optical Transceiver Module by BYXGD provides up to 25GBASE-ER Lite connectivity between two single-mode (essentially copper-based) fibers at distances as far as forty kilometers using multiple CWDM (Continuous Wave Division Multiplexing) wavelengths between the ranges of 1270nm and 1370nm. Its data rates vary from 8.5 Gb/s to 28.1 Gb/s, supporting 25 GbE CPRI and eCPRI applications in data centers and telecom networks.
This model utilizes a CWDM DFB laser in combination with a high-sensitivity APD receiver to deliver consistent long-distance transmission. The optical link budget can achieve up to 19 dB when FEC is applied and 14 dB without, all of which meet the standards for IEEE 802.3by 25Gb/s, SFF-8431, and SFF-8472 MSA. This BYXGD module is capable of performing real-time Digital Diagnostic Monitoring (DDM).
The transceiver operates using a standard +3.3V power supply, has an integrated LC duplex connector, and is housed in a metal enclosure to improve EMI (electromagnetic interference) resistance. It can function within the temperature range of 0°C to 70°C and has been certified for CE and RoHS compliance. This module is also highly interoperable with other major brands of networking equipment, such as Cisco and Huawei.
Specifications
| Brand | BYXGD |
| Form Factor | SFP28 |
| Max. Data Rate | 25G (8.5–28.1 Gbps) |
| Application | 10G Ethernet (10.31 Gbps); 25G Ethernet (25.78 Gbps); CPRI; eCPRI |
| Distance | 40 km |
| Fiber Type | Single-Mode Fiber (SMF), OS2 |
| Connector Type | Duplex LC/UPC |
| TX Wavelengths | 1270 nm, 1290 nm, 1310 nm, 1330 nm |
| RX Wavelength Range | 1270–1610 nm (CWDM) |
| TX Wavelength Bandwidth | 20 nm |
| RX Wavelength Bandwidth | CWDM 1270–1610 nm |
| Transmitter Type | CWDM DML / DFB laser |
| Receiver Type | APD photodiode |
| Optical Budget | 14 dB (without FEC); 19 dB (with FEC) |
| Average Launch Power (Min) | 0 dBm |
| Average Launch Power (Max) | 7 dBm |
| Receiver Sensitivity (Min) | -19 dBm |
| Receiver Sensitivity (Max) | -7 dBm |
| Receiver Overload | -7 dBm |
| DDM/DOM | Supported |
| FEC Support | Host FEC supported |
| Operating Temperature | 0–70 °C (standard) |
| Storage Temperature | -40–85 °C |
| Relative Humidity | 5–85% |
| Power Supply | +3.3 V single power supply |
| Power Consumption | ≤1.5 W |
| Compliance | IEEE 802.3cc; IEEE 802.3by; 25GBASE-LR / 25GBASE-ER Lite; SFP28 MSA; SFF-8431; SFF-8432; SFF-8472; CE; RoHS; Class I laser safety |
| Media / Interface | Dual-fiber SMF, duplex LC interface |
| Digital Diagnostics | Digital Diagnostic Monitoring (DDM/DOM) |
| Product Type | 25G CWDM SFP28 1270–1610 nm 40 km DDM SMF Transceiver |
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