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Actelis: XR239 EFM Repeater

High Performance Broadband Over Copper

Now in their sixth generation, Actelis’ XR239 EFM Repeaters are the world’s first standards-based and most widely deployed 2-pair repeaters for 2Base-TL Ethernet in the First Mile (EFM) systems.

Standards based and widely deployed

Used with Actelis’ Ethernet over copper equipment, XR239 EFM Repeaters extend the reach of high-capacity Ethernet to cover over 98% of loop lengths. Actelis’ repeaters can be linked together and used to extend the reach of carrier Ethernet over copper services beyond 100Kft (19 miles, or more than 30km) using 0.5mm (AWG 24) cable.
Actelis’ Ethernet over copper equipment delivers the best performance over bonded EFM copper links. The patented, award-winning EFMplusTM technology uses advanced signal processing to obtain the greatest rate, reach and reliability performance over voice-grade copper cabling. Actelis’ EFMplus delivers symmetrical service up to 100Mbps using 8-pair bonded links over one mile, or 1.6km. Actelis’ XR239 EFM Repeaters extend the reach of EFM services by regenerating the signal between the carrier’s central office and customer premises. Supporting higher rates, the XR239 EFM Repeaters extend the distance to over 9.5 miles, or 15km, enabling more than 10Mbps per pair.
XR239 EFM Repeater
XR239 EFM Repeater

Key Take Aways

Reduced Installation

Dual-side feeding configurations eliminate the need to rewire enclosures

Long Reach

Linking multiple units to extend the reach of carrier ethernet up to 30km

Standards Based

Worlds first and most widely deployed

Actelis’ XR239 EFM Repeaters are designed for deployment in outside plant or indoors. They occupy a single slot in any industry-standard 239 mechanics enclosure or common European carrier-grade enclosures so that the repeater can be deployed in existing electrical facilities. For outside plant deployments, Actelis’ XR239 EFM Repeaters come in an environmentally hardened case and support a variety of field installations, including cabinet, pole and building mounts. In these installation scenarios, the repeaters are line-powered from a remote PFU (Power Feeding Unit) directly connected to either an Actelis ML2300, ML230, ML130, ML1300 aggregation platform or ML600 EAD and have no additional electrical or environmental requirements.


  • Designed for IEEE 802.3ah Ethernet in the First Mile (EFM) 2 Base-TL systems
  •  Covers over 98% of loop lengths
  • Extend service reach beyond 19 miles (>30 km) using 0.5 mm (AWG 24) cable
  • Delivers the best performance over bonded EFM copper pairs
  • Simplified installation and lower OpEx utilising single-type repeater; no need for rewiring in dual-side feeding scenarios
  • Fully standard & spectrally compliant
  • ANSI T1.417-2003 compliant
  • Fully supports ITU-T G.991.2 Performance
  • Transparent to the IEEE 802.3ah OAM and ITU-T G.991.2 EOC messages
  • Environmentally hardened

Application Diagram

XR239 and PFU Application
XR239 and PFU Application

Quick Specs

  • Protocol: IEEE 802.3ah 2Base-TL
  • Linecode: ITU-T G.991.2 rev. 2
  • Bandwidth: Above 10Mbps/pair (20Mbps/XR239SE unit); and Up to 5.7Mbps/pair (11Mbps/XR239 unit)
  • Dynamic Spectral Shaping (DSS): XR239SE only
  • Connectors: 12-pin edge connector (239 mechanics)
  • Number of Pairs: 2 copper pairs in, two copper pairs out
  • Dual-side feeding supported: Up to 8 hops using a dip switch for reverse wiring
Regulatory Approvals/Certifications
  • ANSI T1.417-2003 compliant
  • GR-1089 A3 voltage safety class
  • UL 60950-1, UL 60950-21
  • EN 60950-1, UL 60950-21,
  • CSA C22.2 60950-1, CSA C22.2 60950-21
  • FCC Part 15 Class A
  • CE – EMC and Safety
  • RUS listed

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