Shenzhen JHA Technology Co., Ltd is one of the leading manufacturers of hardened Ethernet, PoE, and fiber connectivity products specifically designed for harsh and demanding environments.


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Unframed E1-4FE interface Converter JHA-CE1F4

    • Based on self -copyright IC
    • Can realize monitor and control of remote equipment, OAM management data did not take up users’ timeslot and save E1 bandwidth
    • Have the function of E1 interface loop back check, avoid the converter crashed because of interface loop return;
    • Have indicator when the device is power-off or E1 line is broken or lose signal;
    • Can set the E1 line that not to send the LINK signal to Ethernet interface while E1 line is broken; The Ethernet interface supports jumbo frames (1916 Bytes);
    • 4Channel 10M/100M Ethernet interface can isolate each other to realize communication independently;
    • Ethernet interface supports10M/100M, half/full duplex auto-Negotiation and AUTO-MDIX (crossed line and straightly connected line self-adaptable );
    • Provide 2 clock types: E1 master clock and E1 line clock;
    • Have three Loop Back Mode: E1 interface Loop Back (ANA)、Ethernet interface Loop Back(DIG)、Command the remote Ethernet interface Loop Back(REM)
    • Have pseudo random code test function, easy the installation and maintenance;
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PDH/Voice Multiplexer

Interface converters

Ethernet to E1 Converter

  • Unframed E1-4FE interface Converter JHA-CE1F4


    This protocol converter (interface converter) using large scale FPGA design, ITU-T G.703 standard unframed E1 interfaces and four 10 / 100Base-T Ethernet interface converter, 10 / 100Base-T channels will be transferred to the switch, HUB, routers, bridges, or other device. And through Optical and other transport equipment were transferred, networking can be composed of different network segments. This device is a high performance, adaptive remote Ethernet bridge. Its small size, low cost, very suitable for cost-sensitive bridging applications or as a LAN extender or slicer bitstream on infrastructure. Can automatically learn continuously connected LAN MAC address on the destination address of the frame and another LAN forwarding. On the TCP / IP protocol transparent, provide security for the communication network between the different interface devices, seamless connectivity. This equipment is widely used between WAN and LAN networking, monitoring field

    Product Photo

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    Mini Type

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    19inch 1U type


    • Provide 2 impedances: 75 Ohm unbalance and 120 Ohm balance;
       Have Ethernet monitor self-reset function, the equipment will not dead
    • Ethernet interface supports the counters of receiving and transmitting frame, receives wrong frame counters.  E1 interface supports the counters of receiving wrong frame;
    • Support SNMP Network Management;
    • Realize monitor of remote equipment temperature and voltage from local equipment; 
    • Can form the structure: Ethernet E1 Bridge(A)---E1 Optical Fiber Modem(B)---Ethernet Optical Fiber Modem (C)




    ♦ E1 Interface

    Interface Standard: comply with protocol G.703;
    Interface Rate: n*64Kbps±50ppm;
    Interface Code: HDB3;

    E1 Impedance: 75Ω (unbalance), 120Ω (balance);

    Jitter tolerance: In accord with protocol G.742 and G.823

    Allowed Attenuation: 0~6dBm


    ♦ Ethernet interface(10/100M)

    Interface rate: 10/100 Mbps, half/full duplex auto-negotiation

    Interface Standard:     Compatible with IEEE 802.3, IEEE 802.1Q (VLAN)

    MAC Address Capability: 4096

    Connector:     RJ45, support Auto-MDIX


    ♦ Working environment

    Working temperature:    -10°C ~ 50°C

    Working Humidity:     5%~95 % (no condensation)

    Storage temperature: -40°C ~ 80°C

    Storage Humidity:  5%~95 % (no condensation)



    Model Model Number: JHA-CE1F4
    Functional Description 1channel unframed E1 – 4FE interface converter, 10/100 adaptive, support VLAN, -48V or AC220V power supply (optional)
    Port Description One E1 interfaces, four Fast Ethernet ports
    Power Power supply: AC180V ~ 260V;DC –48V;DC +24VPower consumption: ≤10W
    Dimension Product Size:   Mini type  216X140X31mm (WXDXH),1.3KG/piece              19inch 1U type  483X138X44mm (WXDXH),2.0KG/piece


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