With the rapid development of cloud computing, artificial intelligence, big data, and enterprise digital transformation, demand for 10G bandwidth continues to grow.
Traditional SFP+ modules support only one optical link per port. In contrast, CSFP (Compact Small Form-factor Pluggable)technology integrates two independent bidirectional transceivers into a single SFP-sized package.
This design enables higher access density without increasing the number of ports.
Similar to CSFP packaging, C-LIGHT also offers SFP56-DD and DSFP56 product series, which integrate two independent optical and electrical channels within one module.
In real network deployments, space, power consumption, and investment cost are key constraints.
Key advantages of 10G CSFP:
Single module with dual channels
100% increase in port density
Reduced chassis space usage
Lower cost per port
Improved network scalability
Higher ROI for infrastructure
For carriers and large enterprise networks, CSFP effectively alleviates port resource limitations.
https://www.c-light.com/products/details/10G_CSFP.html
The C-LIGHT 10G CSFP bidirectional optical module is designed for high-density optical networking applications.
| Parameter | Specification |
|---|---|
| Package | CSFP+ |
| Data Rate | 11.3Gbps ~ 1.25Gbps |
| Optical Channels | Dual-channel BiDi |
| Transmit Wavelength | 1270nm or 1330nm DFB |
| Receive Wavelength | 1330nm or 1270nm PIN |
| Fiber Type | Single-mode fiber (SMF) |
| Transmission Distance | 2km / 10km / 20km |
| Optical Interface | Duplex LC |
| Supply Voltage | 3.3V |
| Max Current | 600mA |
| DDM Monitoring | Supported |
| Operating Temperature | 0°C ~ 70°C |
Compliant with CSFP MSA 2.0 standard, suitable for carrier-grade deployments.
1270nm or 1330nm DFB laser
Output power: -5 dBm ~ 0 dBm
Spectral width ≤ 1nm
Extinction ratio ≥ 4.5 dB
Ensures signal stability in long-distance transmission.
Wavelength range: 1270nm / 1330nm
Sensitivity: ≤ -12.5 dBm
Overload: +3 dBm
Improves link tolerance and stability.
Supports up to 20km over standard G.652 single-mode fiber, ideal for campus and metro access networks.
Improves:
Rack space utilization
Network scalability
Fiber deployment efficiency
Increases user access density while reducing CAPEX.
Suitable for:
Building interconnection
Campus backbone
Disaster recovery links
Widely used in:
Power systems
Rail transit
Smart manufacturing
Industrial automation
One module supports two independent 10G links.
CSFP MSA 2.0 compliant
RoHS certified
FCC EMI compliant
Laser safety certified
Real-time monitoring of temperature, voltage, TX/RX power reduces O&M costs.
Expands capacity without adding extra switch ports.
Although 25G, 100G, and 400G technologies are rapidly evolving, 10G networks remain a core part of enterprise and carrier access infrastructure.
Due to its maturity, stability, low deployment cost, and strong compatibility, 10G CSFP will continue to play a key role in high-density access and fiber expansion scenarios.
For users seeking higher network density and better ROI, the C-LIGHT 10G CSFP 20KM dual-channel module is a highly efficient and reliable solution.
A: Yes, but only Channel A will operate normally.
CSFP modules have two channels (A/B via EEPROM mapping). Standard SFP+ ports provide only one channel, which aligns with Channel A. Channel B remains inactive due to lack of signal support.
A: The key difference is the number of independent channels per slot:
SFP+ BiDi: 1 fiber pair, 1 channel per slot
CSFP: integrates two independent BiDi transceivers, enabling 2 channels per slot and doubling port density
A: CSFP BiDi modules must be wavelength-matched.
Example:
End A: Tx1270nm / Rx1330nm
End B: Tx1330nm / Rx1270nm
A: Single-mode fiber (SMF) is required to achieve 10km or 20km transmission distance.
A: Common causes include:
Incorrect wavelength pairing
Wrong fiber type (not SMF)
Dirty or loose connectors
Optical power imbalance
Device incompatibility
Poor cooling conditions
Module failure (laser/receiver damage)
A: An optical attenuator is recommended to prevent receiver overload caused by excessive transmit power in short links.
A:
Reduces CAPEX by avoiding new high-density switches
Doubles port density without extra power or space
Optimizes existing fiber infrastructure using BiDi technology
