1.25G CWDM SFP 20KM LC Optical Transceiver

Product Model:
ESCxx12-20D(I)
Data Rate:
1.25G
Wavelength:
1270~1450nm
Distance:
20KM
Connector:
LC
Fiber Type:
SM
DDM:
YES
Product Origin:
China
Shipping Port:
ShenZhen/HK

Product Detail

1.25G CWDM SFP 20KM LC Optical Transceiver is a high-performance, hot-pluggable optical module designed for cost-effective wavelength division multiplexing applications. Utilizing Coarse Wavelength Division Multiplexing (CWDM) technology, it operates on one of the ITU-standard wavelengths between 1270nm and 1610nm, enabling multiple independent data channels to be transmitted simultaneously over a single fiber.

This module supports 1.25Gbps data rate and achieves transmission distances of up to 20 kilometers over single-mode fiber, making it ideal for expanding network capacity in metropolitan area networks, enterprise networks, and cable television broadband systems. Featuring a duplex LC connector interface and low power consumption, it provides telecommunications operators and enterprises with a flexible, scalable solution for bandwidth expansion without requiring additional fiber infrastructure. The transceiver's compact SFP form factor ensures compatibility with standard network equipment while delivering reliable performance in CWDM system applications.

Product Features

Data-rate of 1.25Gbps operation
18 CWDM DFB wavelengths laser and PIN photodetector for 20km transmission
Compliant with SFP MSA and SFF-8472 with duplex LC receptacle
Digital Diagnostic Monitoring: Internal Calibration or External Calibration
Compatible with SONET OC-24-LR-1
Compatible with RoHS
+3.3V single power supply
Operating case temperature: Commercial Temperature: 0 to +70°C Industrial Temperature: -40 to +85°C


SFP CWDM 20KM	SFP CWDM 60KM	SFP DWDM 80KM	SFP DWDM 120KM	SFP DWDM 160KM
1.25G	1.25G	1.25G	1.25G	1.25G
20KM	60KM	80KM	120KM	160KM
CWDM	CWDM	DWDM	DWDM	DWDM
LC	LC	LC	LC	LC
SM	SM	SM	SM	SM
DDM	DDM	DDM	DDM	DDM
COM: 0°C ~70°C EXT: -20°C ~85°C IND: -40°C ~85°C	COM: 0°C ~70°C EXT: -20°C ~85°C IND: -40°C ~85°C	COM: 0°C ~70°C EXT: -20°C ~85°C IND: -40°C ~85°C	COM: 0°C ~70°C EXT: -20°C ~85°C IND: -40°C ~85°C	COM: 0°C ~70°C EXT: -20°C ~85°C IND: -40°C ~85°C

FAQ:

Q1: What is a 1.25G SFP transceiver?‌

A1: 1.25G SFP (Small Form-factor Pluggable) is a compact, hot-swappable optic module supporting 1.25Gbps speeds for fiber or copper networks, commonly used in Gigabit Ethernet and Fiber Channel applications.

Q2: What are the typical applications of 1.25G SFP?‌
A2: Gigabit Ethernet (1000BASE-SX/LX/ZX)‌
Fiber Channel (1G/2G/4G)‌
SDH/SONET networks‌

Q3: What is the maximum distance for 1.25G SFP LX?‌
A3: The ‌1000BASE-LX‌ variant supports up to ‌10km‌ over single-mode fiber (SMF), while ‌1000BASE-SX‌ reaches ‌550m‌ over multimode fiber (MMF).

Q4: What wavelengths do 1.25G SFP modules use?‌
A4: SX‌: 850nm (MMF); LX/ZX‌: 1310nm/1550nm (SMF)

Q5: How does a BIDI SFP differ from a standard SFP?‌
A5: Standard SFPs require ‌two fibers‌ (one for TX, one for RX), while BIDI SFPs use ‌one fiber‌ with wavelength-division duplexing (WDM).

Q6: How far can a 1.25G SFP ZX module transmit data?‌
A6: The ‌ZX variant‌ supports extended distances up to ‌80km over single-mode fiber‌, ideal for long-haul applications like telecom backbones.

Q7: Are 1.25G SFP modules compatible with industrial temperature ranges?‌
A7: Yes, many industrial-grade modules operate in ‌extreme temperatures from -40°C to 85°C‌, ensuring reliability in harsh environments like outdoor networks.

Q8: What is the role of Digital Diagnostics Monitoring (DDM/DOM) in 1.25G SFP?‌
A8: DDM/DOM provides real-time tracking of parameters like temperature and optical power, enabling proactive maintenance and fault detection for network stability.

Q9: Can 1.25G SFP modules connect to CWDM or DWDM systems?‌
A9: Yes, specialized ‌CWDM and DWDM variants‌ exist for wavelength division multiplexing, allowing efficient bandwidth usage in metro or data center networks.

Q10: Why choose BIDI over standard SFP for FTTH?‌
A10: BIDI SFPs ‌halve fiber usage‌, reducing infrastructure costs in passive optical networks (PON).