1.25G SFP ZX 80km Optical Transceiver Module
Product Overview
The Apex 1.25G SFP ZX module is the long reach Gigabit optic. A 1550nm DFB transmitter with high output power and a sensitive receiver close an 80km span on standard single mode fiber, which is the reach needed between cities, between a metro ring and an outlying exchange, or across a long utility route.
1550nm is the low loss window of single mode fiber, which is why it carries Gigabit to 80km without amplification. The trade off is dispersion: on long spans the link budget has to account for both the fiber loss and the transmitter spectral width, so we check span length, splice count and connector losses before shipping.
The module uses the standard SFP MSA footprint, so it fits the same cages as the rest of the Gigabit line and reports diagnostics through DDM. Duplex LC versions are standard, and longer builds up to 100km and 120km are available on request for networks that need the extra margin.
Key Features
- 1.25Gbps line rate for Gigabit Ethernet and SDH STM-1 / OC-3
- 1550nm DFB transmitter for high power long reach links
- 80km reach over standard single mode fiber
- 100km and 120km builds available on request
- SFP MSA hot pluggable package with duplex LC interface
- Digital Diagnostic Monitoring (DDM/DOM) for live optical readings
- Coded for the platform you name before shipment
- RoHS compliant and tested for optical power and error rate
Technical Specifications
| Specification | Detail |
|---|
| Part Number | APX-SFP-1.25G-80km-ZX |
| Manufacturer | Apex |
| Data Rate | 1.25Gbps |
| Form Factor | SFP, hot pluggable |
| Optical Technology | Long reach, duplex, single channel |
| Wavelength | 1550nm DFB |
| Maximum Reach | 80km over SMF, 100km and 120km on request |
| Fiber Type | Single Mode Fiber (SMF) |
| Connector Type | LC duplex |
| DDM / DOM | Supported |
| Power Supply | 3.3V |
| Compliance | SFP MSA, 1000BASE-ZX, RoHS |
| Temperature | 0 to 70C commercial, -40 to 85C industrial on request |
Applications
Inter City and Metro Routes
Connects exchanges and data sites across a metropolitan area or between two cities on the same single mode cable.
Utility and Transport Networks
Carries protection, telemetry and control channels along long rights of way where intermediate regeneration is not practical.
Remote Site and Substation Links
Reaches isolated sites, substations and remote equipment huts that sit far beyond the 10km or 40km Gigabit reach classes.
Compatibility
1.25G ZX modules are coded for the switch, router or transmission platform you name and are tested before shipment. Long reach links are sensitive to the total optical loss, so we ask for the fiber route length, the number of splices and the patch panel count, and we check the budget against the module specification before the order is released.
Related Products
Frequently Asked Questions
How far can a 1.25G ZX module reach?
80km over standard single mode fiber, and longer custom builds up to 100km and 120km are available on request with the optical budget checked first.
Do I need an amplifier for 80km Gigabit?
No. 1550nm ZX modules are designed to close an 80km budget without amplification, which is one of the reasons they are used for Gigabit long reach links.
What limits ZX reach in practice?
The optical budget and chromatic dispersion. Fiber loss, splice losses, connector losses and patch panels all add up, so spans close to 80km should be measured before the modules are installed.
Can ZX be used in an amplified DWDM system?
Where the route carries many channels, a DWDM module on the appropriate grid channel is the better choice because the wavelength can be multiplexed and amplified with the rest of the traffic.
Why Choose Apex
- Optical engineering support and supply from 1.25G to 800G, including long reach and WDM lines.
- Optical budget checked against your span, with test reports on request.
- Every module is tested for optical power, error rate and interoperability before shipment.
- Backed by a 3 year warranty and technical support before and after the sale.
