The 155M SFP transceiver modules deliver reliable, low‑latency 155 Mb/s optical connectivity for legacy SONET OC‑3 (155.52 Mb/s), SDH STM‑1, and 100BASE‑FX Fast Ethernet networks.
Fully compliant with SFP MSA (SFF‑8074/8472), ITU‑T G.957 (SDH), and IEEE 802.3u (Fast Ethernet), these pluggable modules support interoperability across telecom and data equipment.
Available as 155M FX, LX, ZX, and BiDi types, they cover distances from 2 km to 120 km over MMF or SMF, offering a stable solution for industrial and carrier‑grade links.
Technical Specifications
- Data Rate: 155 Mb/s (OC‑3 / STM‑1 / 100BASE‑FX)
- Transmission Distance: 2 km to 120 km depending on variant
- Wavelength: 1310 nm or 1550 nm; BiDi 1270 / 1330 nm pairs available
- Connector: Duplex LC or Simplex LC (for BiDi)
- Optical Components: FP Laser Tx / PIN Rx (standard), optional APD Rx for long reach
- Power Consumption: ≤ 1.0 W
- DDM/DOM: Digital Diagnostics Monitoring per SFF‑8472 (optional)
- Compliance: ITU‑T G.957, IEEE 802.3u, SFP MSA, RoHS 6 compliant
Main Features
- Hot‑pluggable SFP design compatible with legacy 155 Mb/s optical systems
- Supports SONET OC‑3, SDH STM‑1, and Fast Ethernet (100BASE‑FX/LX/BX) applications
- Long reach options up to 120 km using 1550 nm ZX modules
- Low power and low EMI design suitable for dense rack mount equipments
- Optional BiDi versions reduce fiber usage by transmitting on a single strand
- DOM support for real‑time monitoring of optical performance
- Rugged versions available for industrial temperature environments
- Fully interoperable with leading network and telecom vendors
Applications
- SDH STM‑1 and SONET OC‑3 legacy transport systems
- 100BASE‑FX/LX Fast Ethernet links in carrier or industrial networks
- Metro access and transmission equipment
- SDH multiplexers and Add/Drop Multiplexer (ADM) trunks
- Industrial Ethernet and SCADA communicators
Related Keywords: 155M SFP, OC‑3 SFP transceiver, STM‑1 SFP, 155 Mb SFP module, 100BASE‑FX SFP, 155M BiDi SFP, 155M LX SFP, MEFiber 155 Mb/s SFP.
FAQ – 155M SFP Transceiver Modules
1. What is a 155M SFP transceiver?
A 155M SFP is an optical transceiver that operates at 155 Mb/s to support SONET OC‑3, SDH STM‑1, and 100BASE‑FX/LX Fast Ethernet links over fiber.
2. What types of 155M SFP modules are available?
Variants include FX (2 km MMF), LX (20 km SMF), ZX (80–120 km SMF), and BiDi (single‑fiber 1270 / 1330 nm pairs).
3. Are 155M SFP modules interchangeable with Gigabit SFPs?
No, the data rate and modulation differ; 155M SFPs must be used in ports specifically designed for 155 Mb/s operation.
4. Can 155M SFP modules be used in SONET/SDH equipment?
Yes, they fully support OC‑3/STM‑1 framing per ITU‑T G.957 and are compatible with telecom gear that uses SFP interfaces.
5. Do these modules support digital diagnostics (DDM/DOM)?
Many models include SFF‑8472 digital monitoring functions for optical power, temperature, and voltage parameters.
6. What is the maximum distance for 155M SFP modules?
Standard FX modules reach 2 km, LX 20 km, and long‑haul ZX modules reach up to 120 km over single‑mode fiber.
7. Are industrial‑temperature options available?
Yes, industrial grades (‑40 °C to +85 °C) are offered for outdoor and factory automation systems.
8. Where are 155M SFP modules typically used?
They are commonly used in telecom multiplexers, access nodes, industrial Ethernet switches, and Fast Ethernet media converters.