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Ethernet Network Considerations

As many other products today, Telemetrics uses Ethernet for data communication. This will require the use of a network switch to connect all the devices in the system, so all devices can communicate with each other. Below are some considerations when designing/implementing your network and working with your network switch.

The Telemetrics equipment requires an Ethernet network with low latency. The data packets from the equipment are small burst approximately 25 to 50ms apart. This type of communication does not require a lot of bandwidth, but requires low latency. Proper operation requires less than 25ms round trip response. Typical packet sizes are 61 bytes. Typical packet rates are 40 packets/second.

Smaller networks: Typically use a non-managed Ethernet switch and generally have no setup required.

Larger networks: May use a manage network switch, the follow needs to be considered;
Port connections:
• Telemetrics devices require ports 3000 to 3004 TCP, Port 2000 UDP, and ICMP protocol for communication. As well as port 80 for html pages (Initial Setup Only).
Port speeds: for best results, the ports should be set and locked as follows:
• Telemetrics RCCP-1 100/Full
• Telemetrics Pan Tilts 100/Half
• Telemetrics EDCS 100/Full
• Telemetrics DS-4 100/Full
• Links between Ethernet switches - 1000/Full.
• Autosense is not recommended.
Higher Functioning Port Parameters
Some managed switches have utilities that monitor the way a network port operators. Because of Telemetrics need for low latency and small packet sizes delivery, special consideration is required to maintain <25ms latency. It is recommended that the switch should not use any port shutdown or standby functions.

Caution: Ethernet networks can be simple or complex; each and every installation is different. The information in this manual is only a guide and additional considerations my need to be made. If you have a network administrator they should be consulted.