G.703 Co-Directional (Co-Dir 64K) to RS232/422/485 Converter
G.703 Co-Directional (Co-Dir 64K) to RS232/422/485 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.
64k-RS232/422 / 485 interface converter provides ITU-T co-64K G.703 standard E1 interface and standard RS232 / 422/485 conversion interface between the physical layer. Network to provide secure communications between devices of different interfaces, the seamless connection. Suitable for transmission equipment E1 channel portion slots available, and the equipment needed to transfer data and only RS232 / 422/485 outlet occasions.


  • Based on self -copyright  IC.
  • Provide 2 clock types: Co-Directional G.703 master clock and G.703 line clock.
  • Provide two loopback functions, namely 703 of the local loop, RS232 / 422/485 from the local loop.
  • Pseudo-random code test function, bring great convenience to installation and commissioning of the equipment.
  • The co-directional 64K G.703 support 120Ω balanced impedance.
  • AC 220V, DC -48V, DC + 24V power Optional ,DC power supply no positive and negative points.


  • 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)
Functional Description
Co-Directional 64K-RS232/422/485 Converter, Serial port rate 0-14.4K
Port Description
1 Co-Directional 64K interfaces, one data interface (RS232 / RS485 / RS422)
Power supply: AC180V ~ 260VDC –48VDC +24V
Power consumption: ≤10W
Product Size:  216X140X31mm (WXDXH)

Ordering Information

G.703 Co-Directional (Co-Dir 64K) to RS232/422/485 Converter, AC or DC power supply.


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