CT-4250TSP-NE4L-E 1310 nm DFB 10 km SFP Transceiver w. DDMI
- Technology
- Fibre optic transceivers
- Partner
- Coretek
The CT-4250TSP-NE4L-E is an industrial-grade optical transceiver in a compact SFP form factor, engineered for reliable multi-gigabit links over single-mode fibre. It operates at a 1310 nm wavelength using a DFB laser, supporting distances up to 10 km. This makes it well-suited for storage area networks (SANs), extended campus fibre links, and other enterprise or telecom applications requiring long-reach connectivity. With support for data rates up to 4.25 Gbps, the module accommodates 4G Fibre Channel and is backward-compatible with 2G and 1G Fibre Channel standards.
Its hot-pluggable SFP design allows easy installation or replacement without network downtime, fitting standard SFP slots in switches and host bus adapters. Designed for an extended -40°C to 85°C temperature range, it performs reliably from controlled data centre environments to outdoor or industrial conditions. The transceiver also provides a digital diagnostic monitoring interface (DDMI), giving network engineers real-time insight into optical power levels, module temperature, and other parameters for proactive maintenance. Complying with the SFP Multi-Source Agreement and relevant optical standards (e.g. SFF-8472), the CT-4250TSP-NE4L-E is interoperable with a wide range of networking equipment and management systems.
Range features
A high level overview of what this range offers
- 1310 nm DFB laser transmitter – Provides stable optical output for up to 10 km single-mode fibre links
- Up to 4.25 Gbps multi-rate support – Supports 4G Fibre Channel and is backward-compatible with 2G/1G FC links for flexible deployment
- Digital diagnostics (DDMI) – Allows real-time monitoring of module conditions (Tx/Rx power, temperature, voltage) for preventive maintenance and quick troubleshooting
- Industrial temperature range (-40 °C to 85 °C) – Operates reliably in both standard data centre environments and harsh outdoor/industrial conditions
- Hot-swappable SFP design – Enables module insertion and removal without shutting down equipment, simplifying maintenance and upgrades
- SFP MSA & SFF-8472 compliant – Ensures interoperability with standard SFP ports and support for digital diagnostic monitoring across various network devices
Downloads
for CT-4250TSP-NE4L-E 1310 nm DFB 10 km SFP Transceiver w. DDMI
What’s in this range?
All the variants in the range and a comparison of what they offer
| Parameter | Value |
|---|---|
Form factor | SFP (Small Form-Factor Pluggable) transceiver, hot-pluggable |
Data rate | 1.0625 Gb/s, 2.125 Gb/s, 4.25 Gb/s (1x/2x/4x Fibre Channel) |
Wavelength | 1310 nm (nominal) |
Optical reach | 10 km over 9/125 µm single-mode fibre |
Transmitter | 1310 nm DFB laser diode |
Receiver | PIN photodiode |
TX optical power | -6 dBm to -1 dBm (typical output power range) |
Receiver sensitivity | ~ -18 dBm at 4.25 Gb/s (up to -22 dBm at lower FC rates) |
Connector | Dual LC duplex connector |
Diagnostics | Digital Diagnostic Monitoring (DDMI, SFF-8472 compliant) |
Operating temperature | -40 °C to +85 °C (industrial range) |
Power supply | 3.3 V DC |
Compliance | SFP MSA, SFF-8472, Class 1 laser safety (IEC 60825), RoHS |
FAQs
for CT-4250TSP-NE4L-E 1310 nm DFB 10 km SFP Transceiver w. DDMI
It supports Fibre Channel link speeds up to 4.25 Gbps. In practice, the transceiver can operate at 1.0625 Gb/s, 2.125 Gb/s, and 4.25 Gb/s, covering the 1×, 2×, and 4× Fibre Channel standards. This multi-rate capability means it can be used for both legacy 1G/2G Fibre Channel installations and modern 4G Fibre Channel networks.
The CT-4250TSP-NE4L-E is primarily designed for Fibre Channel protocols. Its specifications cover the standard Fibre Channel data rates (1.06 to 4.25 Gb/s). While the module’s 1310 nm optics are similar to those used in some Gigabit Ethernet SFPs (1.25 Gb/s), it is optimised and specified for Fibre Channel use. For guaranteed compatibility, it should be used in Fibre Channel applications or in equipment that explicitly supports these Fibre Channel SFP modules.
This module supports distances up to 10 kilometres using single-mode optical fibre. It incorporates a 1310 nm DFB laser transmitter, which is suited to standard 9/125 µm single-mode fibre cabling. Using the proper single-mode LC fibre, you can achieve the full 10 km reach under typical conditions without the need for repeaters.
The DDMI feature gives real-time insight into the transceiver’s operating conditions. The module can report key parameters to the host system, including its internal temperature, supply voltage, laser bias current, transmitted optical power, and received optical power. These diagnostics help with proactive maintenance – for example, they allow detection of fiber link degradation or transmitter aging before a failure occurs by raising alarms if values drift outside of normal ranges.
Yes. This transceiver is rated for an industrial temperature range of -40 °C to +85 °C. Its wide operating range means it can reliably function in non-climate-controlled settings – for instance, in outdoor telecom cabinets or factory floor installations – as well as in standard indoor environments. The device’s specifications ensure that performance remains stable even in extreme cold or hot conditions.
Yes, the CT-4250TSP-NE4L-E is fully hot-pluggable. You can insert or remove it from a live SFP slot without needing to power down the host switch or device. This hot-swap capability simplifies maintenance and upgrades, allowing you to replace or relocate transceivers with no downtime. It enables network administrators to rapidly respond to changes or issues by swapping modules on the fly.
It uses a standard duplex LC connector for the optical interface. The SFP module has a duplex LC receptacle, so it connects to twin LC fibre optic plugs on the cable. This is the common connector type for SFP modules, making the transceiver easy to integrate with existing single-mode fibre patch cords and infrastructure.
The CT-4250TSP-NE4L-E conforms to the SFP Multi-Source Agreement (MSA), ensuring it has the standard electrical pinout and form-factor to fit any MSA-compliant SFP slot. It also supports the SFF-8472 specification, meaning the module’s digital diagnostic functions follow the industry standard format. In terms of safety and regulations, it is classified as an IEC Class 1 laser device (eye-safe under normal operation) and is RoHS compliant, meeting environmental and hazardous substance guidelines.
