Ports n paths

Hi there,

It's great to hear you're diving into setting up your Flex 8400 with SmartLink! Let's address your questions about the network ports and data flows involved:

1. Purpose of TCP Port 4994:

TCP port 4994 is primarily used for control commands between the SmartSDR client (like your Maestro C or PC) and the Flex 8400 radio. This includes operations such as changing frequencies, adjusting settings, and other command-and-control communications. This port connects to the IP address of the radio.

2. Purpose of UDP Port 4993:

UDP port 4993 handles the streaming of real-time data, such as spectrum displays and audio streams, from the Flex 8400 to the SmartSDR client. This allows for low-latency transmission of data essential for a responsive user experience. Similar to TCP 4994, the communication on this port is initiated by the SmartSDR client during a remote session and connects to the IP address of the radio.

3. Additional Outbound Connections from the Flex 8400:

Beyond ports 4994 and 4993, the Flex 8400 makes several outbound connections:

• FlexRadio Systems Services: The radio connects to FlexRadio's servers for purposes like license verification, software updates, and SmartLink registration. These connections are typically over HTTPS (TLS), ensuring secure communication.
• Network Time Protocol (NTP): The device uses NTP to synchronize its internal clock with global time servers, ensuring accurate timekeeping essential for various operations.

These outbound connections are crucial for maintaining the radio's functionality and ensuring it operates seamlessly within the SmartLink ecosystem.

4. Documentation of Connections and Data Flows:

While specific technical details about all data flows might not be exhaustively documented publicly, the SmartLink Quick Start Guide provides a comprehensive overview of the setup process and the roles of various ports.

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