G.703 Co-Directional (Co-Dir 64K) to Ethernet Converter
G.703 Co-Directional (Co-Dir 64K) to Ethernet Converter Co-Directional 64K E1 Interface Converters Interface Converters AD-Net Selangor, Malaysia, Kuala Lumpur (KL), Petaling Jaya (PJ) Supplier, Suppliers, Supply, Supplies | Catacomm Corporation Sdn Bhd


64k-V.35 / V.24 interface converter provides ITU-T co-64K G.703 standard E1 interface and standard V.35 conversion interface between the physical layer / V.24.
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 10M/100M, half/full duplex auto- adaptable, supports VLAN.
  • 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)
Model Number: AN-COD-E1
Functional Description
10 / 100M Ethernet data transmission channel in the same direction on the G.703 (Co-Directional G.703), Ethernet rate 64K
Port Description
One co-directional 64K interface, 1 Fast Ethernet interface
Power supply: AC180V ~ 260V£»DC –48V£»DC +24V
Power consumption: ≤10W
Product Size:  216X140X31mm (WXDXH)

Ordering Information

One co-directional 64K interface, 1 Fast Ethernet interface converter, AC or DC power.


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