EFM-10/20/40 LAN Extender

EFM-10-20-40 Lan Extender

EFM-X0 is an Ethernet Network Extender designed to provide bonded high-speed Ethernet First Mile services over SHDSL on existing copper infrastructure. It is a bridge mode modem that delivers Ethernet services with symmetrical bandwidth at rates up to 22.8 Mbps (4 Pairs, Standard mode with TC-PAM 32) and 45.3 Mbps (4Pairs, Enhanced mode with TC-PAM 64). Implemented based on IEEE 802.3ah EFM standards for advanced performance and management features, EFM-X0 ensures high reliability, low expense and maximum throughput. The introduction of EFM copper bonding technology allows delivery of higher bandwidth to longer distances over multiple copper pairs, enabling a good alternative in place where fibre is not economical to deploy. This Ethernet-pure solution provides a seamless integration into today and tomorrows networks. EFM-X0 extends the reach of Ethernet services to the sites by using bonded copper pairs. Up to 4 pairs can be bonded together for aggregated bandwidth over 45Mbps (Enhanced mode with TC-PAM 64 line coding technology). Designed with standard-based EFM technology (2BASE-TL), deployment of Ethernet services with EFM-X0 is quick and simple on the existing copper plant. It operates mainly in Point-to-Point connection between remote office and enterprise headquarters, providing symmetrical high-speed connectivity that is ideal for large and small-to-medium enterprises to deliver business-class Ethernet service.

Application Diagram:

EFM application diagram

Bandwidth Aggregation:

EFM-10-20-40 Lan Extender schematic


  • Extending Ethernet Services to sites with existing copper infrastructure
  • Support TC-PAM 32 for 5.7 Mbps over single pair copper (Standard mode)
  • Support industry-leading TC-PAM 64 for 11.3 Mbps over single pair copper(Enhance Mode Higher speed with shorter reach option)
  • EFM Bonding (PAF, PME Aggregation Function) up to 4 pairs
  • Flexible and Rapid Service Deployment
  • Flexible configuration as CPE or CO
  • Support EFM OAM complying IEEE 802.3ah
  • Low Delay, Jitter and Packet Loss for delay sensitive applications
  • Comprehensive and easy OAM & P functions in provisioning and management
  • QoS feature for guaranteed Ethernet service
  • Future-proof Ethernet traffic management and QoS features
  • For use in conjunction with BT's EPS8 and EPS9 circuits


Network Interface - LAN:

  • 4 port switching hub
  • 10/100BASE-T auto-negotiation & sensing
  • Auto MDI/MDI-X

Network Interface - WAN

  • ITU-T G.991.2.(2004)
  • 2BASE-TL
  • EFM bonding (IEEE 802.3ah PAF)
  • Data Rate:
    N x128 Kbps(N=3~89) as 2 wire model
    N x256 Kbps(N=3~89) as 4 wire model
    N x512 Kbps(N=3~89) as 8 wire model
  • Support of Annex A, Annex B, Annex AF & Annex BG
  • Impedance: 135 ohms

LAN Protocols:

  • 802.1d Transparent Bridging
  • Up to 2K MAC Address learning bridge

Hardware Interface:

  • DSL : RJ-45 x 1
  • LAN : RJ45 x 4
  • MGMT: RJ45 x 1
  • Console Port x 1
  • Reset Button : Load Factory Default
  • DC Power Jack x 1


  • LAN : Link/Act, 10/100 per port
  • WAN: Link per loop
  • System: Power, Alarm, MGMT

Management Interface:

  • Easy to use web-based GUI for quick setup, configuration and management
  • Menu-driven interface/Command line interface (CLI) for local console and telnet access
  • Password protected management and access control list for administration
  • SNMP v1/v2 (RFC1157/1901/1905) agent and MIB II (RFC1213/1493)
  • EFM OAM (IEEE 802.3ah)
  • Software upgrade via web-browser/TFTP

VLAN Support:

  • IEEE 802.1q VLAN Tagging
  • Port Based VLAN
  • Up to 4K 802.1q VLAN
  • VLAN Stacking (Q-in-Q)

QoS Support:

  • Rate limiting by rule-based/port-based
  • Traffic classification based on port/802.1p/DSCP
  • WRR (Weighted Round Robin)/SPQ (Strict Priority Queuing) scheduling algorithm


  • Operating Temperature: 0°C ~ +50°C
  • Extended Operating Temperature: -20°C ~ +45°C
  • Storage Temperature: -40°C ~ +85°C
  • Relative Humidity: 98%, non-condensing


  • ISO 9001 Quality Management
  • CE Approval

Physical / Electrical:

  • Dimension : 195 x 48 x 168mm (D x W x H)
  • AC Power Adapter (90~240VAC with 50~60Hz)
  • Weight: 5610E: 1300g, 5620E: 1320g , 5640E :1340g


  • 2MB Flash Memory , 4MB SDRAM

Live Demo of FRM220 Chassis

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