Co-Directional 64K-FE Converter

    The G.703 (Co-Directional G.703) interface divides 64Kbps cycle into 4 unit intervals, it uses“0101” represent  “0”, “1100” represent “1″. By alternating transformation polarity of the adjacent block, binary signals convert three-level signals. In every 8th group destroyed block of alternating polarity, thus to transmit 8KHz timing signal. By the above coding, G.703 co-directional 64Kbps signal could achieve transmitting the timing signal of 64KHz and 8KHz and 64KHz and the data signal of 64Kbit/s in the same direction with a pair balanced line.
       This interface converter provides one co-directional G.703 interface and one Ethernet interface to achieve 10/100Base-T Ethernet data transmission on the G.703 channel. It is a high performance, self-learning Ethernet bridge. This device is the extension device of Ethernet, using network (PDH/SDH/Microwave) that provide G.703 channel to achieve local and remote Ethernet interconnecting with serial interfaces at a lower cost. The device has inter-set loop test function to facilitate the project launching and daily maintenance.

●Based on self -copyright  IC
●Can Realize Ethernet data transmission in one Co-directional G.703 circuit
●Inter-set dynamic Ethernet MAC address (4,096) with local data frame filtering
●The local device can manage the remote device
●Have the function of G.703 loop back check, and indicate on LED
●Can differentiate the reason of Co-directional G.703 lose signal is that the remote device power-off or directional G.703 line broken
●Ethernet interface supports AUTO-MDIX (crossed line and straightly connected line self-adaptable );
●Provide 2 clock types: Co-Directional G.703 master clock and G.703 line clock;
●The local device can forced the remote device rate follow it(when the device is unframed mode, that is invalid)
●Have three Loop Back Mode: G.703 interface Loop Back (ANA)、Ethernet interface Loop Back(DIG)、Command the remote Ethernet interface Loop Back(REM)
●Support self-adaptable 120 Ohm balance;

Co-Directional G.703 Interface  
Interface Standard: comply with protocol ITU-T G.703;
Interface Rate: 64Kbps±50ppm;
E1 Impedance: 120Ω (balance);
Jitter tolerance: In accord with protocol G.742 and G.823
Maximum Transmission Distance: up to 500m
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)