4.1.9.2 Extension host
The EXTENSION port behind the host to connect the extension host, it can use its normal
function when external connect TS-0205, cascading TS-0206.
4.1.9.3 COM port usage
COM port of Host rear panel connect to the TS-0698 camera tracking host.
4.1.9.4 485 interface usage
485 interface of host rear panel connect to a camera.