CableWorld ASI to IP Converter CW-4841

The CW-4841 ASI to IP Converter receives the transport stream at its ASI input, implants it in UDP/IP packets to send them through 100 MBit/s Ethernet network with internet protocol (IP) to the desired destination.

Digital television technology constitutes a part of the high-speed wide band data transmission systems. Thus the change of the television technology to digital requires designers and operators of cable television systems to extend their activity to the field of computer technology and data transmission.

The signals of digital television can be transmitted beyond coaxial cable through nearly any network, thus digital television offers the possibility of implementing new facilities such as IP television, feeding television signals into high-speed data transmission systems or even supplying cable television headends through the SDH networks.

The CW-4841 ASI to IP Converter receives the transport stream at its ASI input, implants it in UDP/IP packets to send them through 100 MBit/s Ethernet network with internet protocol (IP) to the desired destination. Such single usage can be e.g. feeding the transport stream into the computer, or outputting in ASI environment data streams generated in the computer.

– Transferring the transport stream in IP environment using UDP/IP protocol
– Establishing standard Ethernet communication in 100 MBit/s environment
– Solving the speed and timing problems arising from the intermittent transmission of the UDP/IP packets
– Free programmable IP address
– Free managing software available at www.cableworld.hu

The CW-4841 ASI to IP Converter receives the transport stream at its ASI input, converts it to UDP/IP packets, then sends them through 100 Mbit/s Ethernet network to the pre-set IP address. The IP address of both the transmitting and the destination device are free programmable. After switching on the device, by sending out ARP messages it establishes connection with the addressed device, then it starts sending the transport stream. In lack of response, sending out the ARP
messages is repeated continuously and sending the TS does not start until response is received. After response arrived, the UDP/IP packets are sent to the MAC address given in the response, thus the connection can be built through router or gateway, too.

The UDP/IP packets include beside the transport stream data also continuity counting data and PCR signal. The device can handle all versions of the IP4 header; it answers ICMP Ping Request packets with ICMP Ping Replay, if the data content is between 0 … 128 bytes. Response time is 1 … 3 ms depending on the length of the data content. The detailed description of the message handling and the instruction set are given in the CW_Net_a.pdf file.

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