G.SHDSL.bis EFM Modem with 4 x Ethernet


  • Bonded high-speed Ethernet First Mile services over bare copper wires
  • Deliver Ethernet services with symmetrical bandwidth up to 61Mbps
  • High reliability, low expense and maximum throughput
  • Extend Ethernet Services to sites over existing copper infrastructure
  • EFM Bonding up to 61 Mbps (4 pairs)
  • Flexible and Rapid Service Deployment
  • Flexible configuration as CPE or CO
  • Supports 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


Item Description

4-Port switching hub
10/100Base-T auto-negotiation & sensing


ITU-T G.991.2.(2004)
EFM bonding (IEEE 802.3ah OAM)
Data Rate:
• Nx 64 Kpbs (N=3~89) using TC-PAM 16/32
• Max. 5.696Mbps (1-Pair)
• Max. 11.392Mbps (2-Pair)
• Max. 22.784Mbps (4-Pair)
• N x 64 Kbps (N=3~239) using TC-PAM 64/128
• Max. 15.296 Mbps (1-Pair)
• Max. 30.592 Mbps (2-Pair)
• Max. 61.184 Mbps (4-Pair)
• Supports of Annex A, Annex B, Annex AF & Annex BG

LAN Protocols

802.1d Transparent Bridging
802.3/802.3u; 802.3x flow control
Up to 2K MAC Address learning bridge

Hardware Interface

DSL : RJ-45 x 1, LAN : RJ45 x 4, Console Port x 1
MGMT : RJ45 x1, DC Power Jack x 1
Reset Button : Load Factory Default


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

Management Interface

Easy to use web-based GUI for quick setup, configuration and management
Menu-driven interface 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
EFM OAM (IEEE 802.3ah)
Software upgrade via web-browser / TFTP

VLAN Support

IEEE 802.1Q VLAN Tagging
Up to 8k 802.1q VLANS (ID Range 1~4094)
Port Based 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,IPv6 (RFC 5430) pass through


Operating Temperature : 0 ~ 50°C
Storage Temperature : -40 ~ 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 (100 ~ 240VAC)
Weight : 1.3kg


2MB Flash Memory, 8MB SDRAM

Ordering Information

Order Code Description
CT-EFM-10 2W, 2Base-TL, 4x10/100Base-TX G.SHDSL.bis EFM modem
CT-EFM-20 4W, 2Base-TL, 4x10/100Base-TX G.SHDSL.bis EFM modem
CT-EFM-40 8W, 2Base-TL, 4x10/100Base-TX G.SHDSL.bis EFM modem

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