The J-Link software provides a TELNET-like channel on a localhost port (default: 19021) to allow easy access to RTT data from a separate 3rd party application that may run in parallel to the debug session. The TELNET channel is very simple to use and basically all it requires is to open a local TCP/IP connection to the TELNET port and start to receive (or send) data.RTT本身就支持从19021端口Telent连接,可以实现终端工具中文显示