Data Connect 2178LRE
Ethernet First Mile EFM Long Reach Ethernet Extender (LRE)2178LREpic

The DCE 2178LRE is a Long Reach Ethernet Network Extender (LRE) designed to provide bonded, high-speed services over SHDSL on existing copper infrastructure using standards based on EFM (Ethernet in the First Mile) technology (2Base-TL). EFM, also known 802.3ah, is a collection of protocol specified in IEEE 802.3 defining Ethernet access network, I.E. first or last mile. With Wide, Metro and Local Area Networks already standardized, EFM allows a continuous Ethernet network across the globe, eliminating non-native transports such as Ethernet over ATM from access networks. EFM also addresses other issues, required for mass deployment of Ethernet services, such as operations, administrations & management (OAM) and spectral compatibility with existing technologies such as voice, ADSL, VDSL and SHDSL. The DCE/2178LRE is a bridge mode modem that delivers Ethernet services with symmetrical bandwidth at rates up to 22.8Mbps with four bonded copper pairs. This “Pure Ethernet” solution provides a seamless integration into today and tomorrow’s networks. The modem operates in point-to-point connections between remote office and enterprise headquarters, providing business-class Ethernet service at symmetrical high–speed connectivity that is ideal for small-to-medium enterprises.


  • Extends Ethernet service to sites with existing copper infrastructure
  • EFM bonding (PAF, PME Aggregation Function) up to 22.8Mbps (4 pairs)
  • Flexible configuration as CPE or CO
  • Supports EFM OAM complying with IEEE 802.3ah
  • Low Delay, Jitter and Packet Loss for delay sensitive application
  • Comprehensive and easy OAM&P function for provisioning and management
  • QOS feature guaranteed Ethernet service
  • Web-based GUI for setup, configuration and management
  • Menu-driven interface for local control via console or telnet
  • Password protected management and access control list for administration
  • Supports firmware upgrade via web

Typical Ranges (26 AWG) 



Connector: RJ45, 8 pins

WAN Interface
SHDSL.bis: ITU-T G.991.2 (2004) Annex AF/BG
Encoding scheme: 16-TCPAM, 32-TCPAM
2Base-TL, 64/65-oclet encoding
EFM bonding (IEEE 802.3ah PAF)
Maximum date rate is 22.8Mbps for 8-wire mode
(5.7Mbps/Port x 4Port=22.8Mbps)
Impedance: 135ohms

LAN Interface
Four RJ45 Connectors
4-Port Switching hub
10/100 Base-T auto-sensing and auto-negotiation
Auto-MDI/MDI-X (Auto-Crossover)
802.1d Transparent Bridging

Ingress Rate control
Egress Traffic shaping
Classification based on Port Base / VLAN Tag /DSCP
4 Priority Queues
WRR(Weighted round-robin)/ BE(Best Effort) / SP(Strictly Priority)

802.1Q Tag-Based VLAN
Port-Based VLAN
Port-Based Q-in-Q
Priority Re-mapping
VLAN Trunk mode

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 OA (IEEE 802.3ah)
Software upgrade via web-browser/TFTP

WAN Link/Activity, LAN Link/Act/Speed
System: Power, Alarm and Management

ITU-T G.991.2, IEEE802.3, 802.3u, 802.3ah, 802.3ad

DC 9V via AC power adapter

Power Consumption

Dimensions (D x W x H)
168 x195 x48mm


0~50°C (Operating), 0~70°C (Storage)

10~90% non-condensing


35, 00 hours

Ordering Information

DCE/2178LRE2-2PK                              4 port LAN extender, 2-wire, 5.7Mbps, 120VAC
DCE/2178LRE4-2PK                              4-port LAN extender, 4-wire, 11.4Mbps, 120VAC
DCE/2178LRE8-2PK                              4 port LAN extender, 8-wire, 22.8Mbps, 120VAC