The 155M CWDM SFP transceivers provide cost‑optimized multi‑channel optical transmission at 155 Mb/s for SDH STM‑1 / SONET OC‑3 / 100BASE‑FX Fast Ethernet systems.
Each module operates on a specific CWDM wavelength per ITU‑T G.694.2 (1270–1610 nm, 20 nm spacing), allowing up to 18 wavelengths over a single fiber pair.
Typical applications include multi‑service access, legacy transport aggregation, and metro optical networks requiring channelized bandwidth expansion on existing fiber infrastructure.
Technical Specifications
- Data Rate: 155 Mb/s (OC‑3 / STM‑1 / 100BASE‑FX)
- Wavelengths: CWDM ITU grid 1270 nm to 1610 nm (20 nm spacing)
- Transmission Distance: up to 80 km SMF (depending on optical budget)
- Connector: Duplex LC
- Optical Components: DFB Laser Tx / PIN or APD Rx
- Power Consumption: ≤ 1.2 W
- DDM/DOM: Digital Diagnostics per SFF‑8472 (optional)
- Compliance: ITU‑T G.694.2 · G.957 · IEEE 802.3u · SFP MSA · RoHS 6 compliant
Main Features
- Hot‑pluggable SFP form factor for 155 Mb/s CWDM applications
- Supports SDH STM‑1 / SONET OC‑3 / Fast Ethernet over SMF
- Operates on ITU‑T G.694.2 CWDM grid (18 wavelength channels)
- Extended link reach up to 80 km
- Low power and low EMI design for dense chassis deployment
- Optional DDM for optical power and temperature monitoring
- Compatible with major telecom and enterprise platforms
- Rugged and industrial temperature models available
Applications
- SDH STM‑1 / SONET OC‑3 multi‑channel CWDM systems
- 100BASE‑FX/BX Fast Ethernet transport over CWDM optical links
- Legacy/Metro fiber optimization using CWDM multiplexers and demultiplexers
- Access network aggregation and FTTx extensions
- Telecom and utilities networks with limited fiber availability
Related Keywords: 155M CWDM SFP, OC‑3 CWDM transceiver, STM‑1 CWDM SFP, 155M DFB SFP, Fast Ethernet CWDM Module, MEFiber 155 Mb/s CWDM SFP.
FAQ – 155M CWDM SFP Modules
1. What is a 155M CWDM SFP transceiver?
It is a 155 Mb/s optical module that uses a specific CWDM wavelength to enable multi‑channel transmission over single‑mode fiber.
2. What standards define CWDM operation?
CWDM channels are defined by ITU‑T G.694.2, with 20 nm channel spacing across the 1270–1610 nm range.
3. Which applications use 155M CWDM SFPs?
They are used for SDH STM‑1, SONET OC‑3, and 100BASE‑FX/BX Fast Ethernet links that require multi‑wavelength fiber capacity.
4. How many CWDM channels are available?
Up to 18 wavelengths (1270 nm to 1610 nm) allow 18 independent 155 Mb/s channels on a single fiber pair using CWDM MUX/DEMUX.
5. What is the maximum reach of 155M CWDM SFP modules?
Standard modules reach 40 km; long‑haul variants extend up to 80 km depending on DFB laser output and APD receiver sensitivity.
6. Do these modules support digital diagnostic monitoring?
Yes, models with DDM/DOM per SFF‑8472 provide real‑time monitoring for optical power, voltage and temperature.
7. Are CWDM SFPs compatible with standard SFP ports?
Yes. Any host device supporting 155 Mb/s SFP interfaces can use CWDM variants without firmware changes.
8. Where are 155M CWDM SFP modules commonly used?
In metro and access networks for multi‑service aggregation, backhaul, and legacy fiber expansion scenarios.