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G.SHDSL Modems
Nexcomm N502 2Base-TL 11.38 Mbps
Nexcomm N554 2Base-TL 22.76 Mbps
Nexcomm N504 2Base-TL 22.76 Mbps
G.SHDSL.bis 5.7 Mbps
VDSL2 V101 100/60Mbps
G.SHDSL.bis 22.76 Mbps
DSLAM ADSL2+ 24/48 ports
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Custom designs

Nexcomm N554 2Base-tl 22.76 Mbit


General info

NexComm Systems' N554 extends the reach of Ethernet services to sites with no access to fiber by using bonded copper pairs. Designed with standard-based EFM technology (2Base-tl), N554 cost-effectively allows service providers and enterprises to deliver Ethernet services with symmetrical bandwidth at rates up to 22.76 Mbps. N554 supports VLAN as well as QoS based on layer 2 802.1P and layer 3 DSCP tags.


g.shdsl - Technical documentation in PDF format.


Technical Specification
Dimensions: 35mm*196mm*156mm
Weight: 1500 g
Hardware interface: DSL interface: 2/4 wires RJ-45 jack.
Ethernet interface: four RJ-45 jack; 10/100 BaseT auto sensing and crossover.
RJ45 interface for local console access
LED indicator: power, DSL links, Ethernet ports
Line Coding: TC-PAM32
Operating Requirements: temperature: 0ºC to +50ºC
hmidity: 5% to 90% RH non-condensing


Standard Compliance

ITU-T G.991.2 (2004)
  • Transmission rate up to 22.76 Mbps on 8-wire
  • Support of Annex A, Annex B, Annex F, and Annex G
  • Support point-to-point configuration
  • Tagged VPN 802.1Q , Q-in-Q, Trunk Mode
  • Quality of Service QoS, 802.1P, DSCP, Ingress/Egress shaping


    • EFM Bonding(PAF) up to 22.76Mbps & EFM OAM support
  • Low protocol overhead
  • Loop resilience


    • IEEE 802.3ah Compliant
  • 2BASE-TL, 64/65o encoding
  • Optimal bitrate negotiated for each loop


    • Menagement
    The N500 series implements IEEE 802.3ah standard and the vendor extended management features based on this standard. It enables users to significantly reduce OPEX by eliminating unnecessary truck roll costs and additional trainings costs as it is based on user-friendly Ethernet technology. N500 is interoperable with any standard Fast Ethernet interfaces from switches, routers, and NG-SONET/SDH Equipment. N500's management interfaces include comprehensive command-line interface (CLI), user-friendly GUI-based Web Browser Interface, SNMP and Telnet.


    Management Interface
    • Console (RS-232, RJ-45)
    • Web Browser(HTTP), SNMP, Telnet
    • EFM (IEEE 802.3ah) OAM
    • RCMP (Remote Control & Management Protocol)

    Production & Regulatory
    • ISO 9001 Quality Management
    • ISO 14001 Environmental management
    • CE Approval
    • VCCI Approval

    Ordering Information
    • N554: 4-pair 2BASE-TL MODEM (List price EUR465)
    Elitel Sp. z o.o.