CT-1250TSP-MB4L-E 1.25Gb/s Single Mode FP SFP Fibre Transceiver
- Technology
- Fibre optic transceivers
- Partner
- Coretek
The CT-1250TSP-MB4L-E is a dependable solution for high-performance networking tasks requiring extended reach. It delivers Gigabit Ethernet connectivity over single-mode fibre links up to 10 km at a wavelength of 1310 nm. Built to the standard SFP form factor, this hot-pluggable module integrates easily into network equipment such as switches, routers, and media converters.
Users benefit from its Digital Diagnostic Monitoring (DDM) feature, which provides real-time insights into operating parameters like temperature and optical power via an I²C interface. The transceiver adheres to industry standards including the SFP Multi-Source Agreement (MSA), IEEE 1000BASE-LX, and 1G Fibre Channel, ensuring broad compatibility and interoperability across different vendors’ systems.
Its 1310 nm Fabry-Perot laser offers a cost-effective optical solution for intermediate-range links, while still meeting Class 1 laser eye safety regulations. In addition, the module is qualified to Telcordia GR-468 reliability standards, indicating robust performance over extended lifetimes even in challenging environments.
Range features
A high level overview of what this range offers
- Up to 1.25 Gb/s data rate – Supports standard Gigabit Ethernet and 1G Fibre Channel links for versatile network connectivity.
- 1310 nm FP laser, 10 km reach – Provides long-distance single-mode fibre links (up to 10 km) suitable for campus and metro network spans.
- Digital Diagnostic Monitoring (DDM) – Offers real-time monitoring of module health (temperature, voltage, TX/RX optical power) via I²C, enabling proactive maintenance and troubleshooting.
- Industrial temperature range (-40 °C to +85 °C) – Ensures reliable performance in extreme environments, from outdoor installations to factory floors.
- Hot-pluggable SFP form factor – Allows easy installation and replacement without shutting down equipment, simplifying upgrades and maintenance.
- Duplex LC optical interface – Uses a standard duplex LC connector for quick integration with single-mode fibre cabling and existing infrastructure.
- MSA-compliant & Telcordia-qualified – Meets the SFP multi-source agreement and is tested to Telcordia GR-468 core standards, guaranteeing interoperability and long-term reliability.
- Rugged metal housing – Durable SFP casing provides excellent EMI/RFI shielding and mechanical stability within network devices.
Downloads
for CT-1250TSP-MB4L-E 1.25Gb/s Single Mode FP SFP Fibre Transceiver
What’s in this range?
All the variants in the range and a comparison of what they offer
| Parameter | Specification |
|---|---|
Data rate | 1.25 Gb/s (Gigabit Ethernet and 1.0625 Gb/s Fibre Channel) |
Wavelength | 1310 nm (FP laser) |
Fibre type & distance | Single-mode fibre, up to 10 km reach |
Optical connector | Duplex LC port |
Digital diagnostics | Yes (DDM, SFF-8472 compliant) |
Transmitter output power | Approx. –9 dBm to –3 dBm |
Receiver sensitivity | Approx. –20 dBm (for BER ≤ 1×10⁻¹²) |
Link budget | ~11 dB nominal |
Power supply voltage | +3.3 V DC |
Power consumption | < 1 W (typical) |
Operating temperature | –40 °C to +85 °C (industrial grade) |
Compliance standards | SFP MSA, IEEE 802.3z 1000BASE-LX, 1G Fibre Channel, Class 1 laser safety |
Reliability qualification | Telcordia GR-468 (telecom-grade reliability testing) |
FAQs
for CT-1250TSP-MB4L-E 1.25Gb/s Single Mode FP SFP Fibre Transceiver
This transceiver supports Gigabit Ethernet (IEEE 802.3z 1000BASE-LX) for 1.25 Gb/s links, and it is also compatible with 1.0625 Gb/s Fibre Channel applications. It adheres to the SFP Multi-Source Agreement (MSA), ensuring it will operate seamlessly in any standard SFP slot across various equipment vendors.
Yes. The CT-1250TSP-MB4L-E features a Digital Diagnostic Monitoring (DDM) function as per SFF-8472. This allows the host system to monitor key parameters in real time via I²C, including the module’s temperature, supply voltage, laser bias current, transmitted optical power, and received optical power. Such monitoring helps with preventive maintenance and troubleshooting.
It uses a 1310 nm wavelength Fabry-Perot (FP) laser transmitter and is specified for single-mode fibre links up to 10 kilometres. This makes it suitable for intermediate-range connections such as campus LAN backbones or metro-access network links that require greater reach than multimode solutions.
Yes. This module is rated for an industrial temperature range of –40 °C to +85 °C, meaning it can perform reliably in extreme cold or hot conditions. Its robust design makes it suitable for outdoor enclosures, roadside telecom cabinets, factory floors, and other harsh environments, as well as standard data centre racks.
Installation is straightforward – the unit is a hot-pluggable SFP transceiver. It slides into any standard SFP cage/port and latches in place. No reconfiguration is needed aside from ensuring the host device recognises the SFP; the module will initialize automatically. Simply connect the duplex LC fibre connectors to the transceiver, and it’s ready to transmit and receive data. Hot-swap capability means you can insert or remove it without powering down your system.
The transmitter provides an optical output in the range of roughly –9 dBm to –3 dBm at 1310 nm. The receiver offers a sensitivity of around –20 dBm (for a bit error rate of 1×10⁻¹²), and an optical overload typically near –3 dBm. These values give an overall link budget of about 11 dB, which aligns with supporting a 10 km single-mode link.
Yes. This transceiver is classified as a Class 1 laser product, which is the safest rating for laser emissions under normal operation. It complies with eye safety standards (IEC 60825-1 and FDA 21 CFR 1040.10), meaning the optical output is within limits that are considered harmless to the human eye when used as intended.
Absolutely. The CT-1250TSP-MB4L-E has undergone Telcordia GR-468 qualification – a rigorous suite of reliability tests for optical components (covering thermal cycling, vibration, humidity, and more). It is fully compliant with the SFP industry standards, ensuring it functions reliably in multi-vendor environments. This level of testing and compliance attests to its durability and long-term performance in the field.
