ODN & accessories · optics
SFP & SFP+ Transceivers
SFP and SFP+ optical transceivers for PON ports, switch uplinks and 1550 nm links: 1G/10G, 1310/1490/1550 nm, 20/40/80 km, SC/LC, EPON PX20++/+++ and GPON Class B+/C+ options. The exact optic is confirmed with the OLT or switch model.
Updated October 24, 2026
- Rate
- 1G / 10G
- Reach
- 20 / 40 / 80 km
- Wavelength
- 1310 / 1490 / 1550 nm
- Connector
- SC / LC
Configuration illustration; the supplied transceiver model is confirmed on the quotation.
The short answer
What this product is specified for.
Included in the quotation
- Port count, connector polish and power configuration
- Model-level datasheet and test data
- Optical budget and splitter plan for the ODN
- Export packing, HS code and Incoterm
An SFP module is the optical interface of the OLT, switch or router. The same port can be a 1G uplink, a 10G uplink or a PON port, depending on the module and the platform. The module’s rate, wavelength, reach and connector must match the port, the fibre and the link budget; a “compatible” module that does not match the OLT optic class will not register.
For PON, the OLT uses EPON PX20++/PX20+++ or GPON Class B+/C+ optics; the ONU side is fixed by the ONU model. For switch uplinks, 1G SFP and 10G SFP+ modules cover 20, 40 and 80 km, with duplex LC or BiDi single-fibre options. A 10GBASE-T SFP+ module is available for a copper 10G link over a short distance.
The link budget decides the reach. A 10 km module is not a 40 km module, and a 40 km module on a short link can overload the receiver. Use the actual fibre length, connector count and splitter loss; for a PON port, the module class must match the OLT’s published optical budget. The model datasheet and the OLT compatibility list are confirmed before the order.
Configuration table
The numbers that decide the fit.
Values are from the model datasheet. Where a value is model-dependent, the table says so instead of guessing.
| Type | Rate | Wavelength | Reach | Typical use |
|---|---|---|---|---|
| EPON SFP | 1.25G | 1310 / 1490 nm | 20 km | EPON OLT / ONU |
| GPON SFP | 2.5G / 1.25G | 1490 / 1310 nm | 20 km | GPON OLT |
| 1G SFP | 1G | 1310 / 1550 nm | 20 / 40 / 80 km | Switch uplink |
| 10G SFP+ | 10G | 1310 / 1550 nm | 10 / 40 / 80 km | 10G uplink |
| BiDi SFP | 1G / 10G | 1310 / 1550 nm pair | 10 / 20 km | Single-fibre link |
| 10GBASE-T | 10G | Copper | 30 m | RJ45 10G uplink |
The module must match the OLT/switch port and the optical budget. Confirm the model and compatibility before the order.
Engineering features
What changes on site.
PON optics
EPON PX20++/+++ and GPON Class B+/C+ options; the OLT class and the ONU sensitivity decide the budget.
Reach options
20, 40 and 80 km for 1G; 10, 40 and 80 km for 10G. Choose the reach from the actual span, not the maximum.
Duplex or BiDi
Duplex LC for a fibre pair; BiDi for a single fibre with a matched pair at each end.
DDM
Digital diagnostics monitor temperature, TX/RX power and bias current for remote troubleshooting.
Compatibility
The module must be supported by the OLT/switch firmware; the compatibility list is confirmed before the order.
Label and spare
Label the module by port and reach; keep a spare of each type used on the site.
Selection guide
Which configuration fits which site.
Start from the site, not from the model. The table is a starting point; the final check is the optical and power budget.
| Link | Recommended | Watch-out |
|---|---|---|
| EPON OLT port | PX20++ or PX20+++ | Match the OLT class and split budget |
| GPON OLT port | Class B+ / C+ | Class C+ needs a compatible ONU |
| 1G building uplink | 1G SFP, 20 km | Check the fibre type and connector |
| 10G campus uplink | 10G SFP+, 10 km/40 km | Check the switch port and reach |
| Single-fibre link | BiDi pair | Pair the wavelengths at both ends |
A module with the wrong reach can overload or under-drive the receiver; use the actual span and connector count.
Related equipment
Complete the chain.
The product is quoted as part of a chain. These are the parts that usually travel with it.
PON access · OLT
GPON OLT
From a 1-PON gateway to a 112-PON headend.
GPON OLT platforms for FTTH, campus and hotel access: 2.5 Gbps downstream and 1.25 Gbps upstream, 1:64 split per PON port and 20 km reach on Class B+ optics. Configurations run from a compact 1-PON gateway with built-in AC to a chassis with up to 112 PON ports.
- Line rate
- 2.5 Gbps ↓ / 1.25 Gbps ↑
- Max split
- 1:64 per PON port
- Reach
- 20 km, Class B+
- PON ports
- 1 – 112
Best for FTTH Access Network · Campus Fibre Network · Outdoor Wireless Coverage
View specifications
PON access · OLT
8-Port EPON OLT
1U, eight EPON ports, up to 512 ONUs.
A 1U EPON OLT with eight PON ports, 16 uplink ports and a 128 Gbps backplane. It supports 1:64 splitting, 20 km reach and up to 512 ONUs, making it a compact headend for CCTV, campus and small FTTH networks.
- PON ports
- 8 × EPON
- Line rate
- 1.25 Gbps symmetric
- Max ONUs
- 512 (64 per port)
- Backplane
- 128 Gbps
Best for CCTV & Surveillance Power · Campus Fibre Network · FTTH Access Network
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PON access · 10G OLT
10G PON / XGS-PON OLT
XGS-PON and 10G PON boards in one chassis.
A chassis OLT for XGS-PON, XG-PON and 10G EPON access: up to 112 PON ports across seven service boards, 100GE uplinks and coexistence with an existing GPON ODN. The PON generation and port count are confirmed by the board mix.
- PON generation
- XGS-PON / XG-PON / 10G EPON
- Line rate
- 10G symmetric (XGS-PON)
- Max PON ports
- 112
- Uplink
- 2× 100GE QSFP28
Best for FTTH Access Network · Campus Fibre Network
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ODN & accessories · enclosures
ODF & Fiber Enclosures
Rack ODF, wall boxes and splice closures.
Passive enclosures for the ODN: 1U rack ODFs, wall-mount distribution boxes, splice closures and terminal boxes, with SC/UPC or SC/APC adapters and 4–96 port options. The enclosure format follows the installation point.
- Formats
- 1U / wall / closure
- Ports
- 4 – 96
- Adapter
- SC/UPC / SC/APC
- Mount
- Rack / wall / pole
Best for FTTH Access Network · Campus Fibre Network · Industrial & Tunnel Network
View specificationsProduct FAQ
SFP & SFP+ Transceivers: questions before the order.
If your question is not here, send the site details and we will answer with the calculation, not a brochure.
Ask an engineerCan I use any SFP module in the OLT?
No. The module must match the port type, the PON class and the firmware compatibility list. A module that powers up may still not register or may fail the optical budget.
What is the difference between PX20++ and PX20+++?
They are EPON OLT optic classes with different optical budgets. The OLT datasheet states the supported class; the ONU and split ratio must fit that budget.
Do I need a 40 km module for a 2 km link?
Not necessarily. A long-reach module can overload a short link; use an attenuator if the receiver input is too high, or choose a shorter-reach module.
What is a BiDi module?
A BiDi module transmits and receives on different wavelengths over one fibre, so a pair is needed at both ends. It saves fibre but requires the correct wavelength pairing.
Does the module support DDM?
Most models support digital diagnostics. Confirm the feature on the datasheet if remote monitoring is required.
Can I mix 1G and 10G modules in the same switch?
Only if the ports support both rates. Many SFP+ ports accept 1G SFP modules, but the switch datasheet is the authority.
Next step
Need a SFP & SFP+ Transceivers configuration checked?
Send the endpoint count, the longest run, the power condition and the destination. We reply with the configuration, the optical/power budget and the quotation assumptions.
No obligation. The plan states its assumptions so your engineer can check it.