What is Telnet Protocol as regards to SENA Products ?
It is a a public protocol known as specified by IETF RFC 2217. COM Port Control is an extension of the Telnet protocol. Hence, it will only be available if the users try to connect to SENA Device Server using the telnet terminal that supports COM Port Control Protocol or SENA’s COM Port Redirector, Serial/IP is configured to use Telnet. During the connection attempt, the terminal or serial/IP will always request that the connection use COM Port Control. If Sena Device Server agrees to use COM Port Control, only then will it become active on the current connection to the Device Server. The Serial/IP redirector indicates a successful negotiation of COM Port Control by displaying three extra “lights” next to the active COM port name in the Port Monitor window. The COM Port Control protocol includes a number of features. The set of protocol features that are supported have proven sufficient for nearly all applications with a need for some degree of port control. Sena Device Servers, PS110/
It is a a public protocol known as specified by IETF RFC 2217. COM Port Control is an extension of the Telnet protocol. Hence, it will only be available if the users try to connect to SENA Device Server using the telnet terminal that supports COM Port Control Protocol or SENA’s COM Port Redirector, Serial/IP is configured to use Telnet. During the connection attempt, the terminal or serial/IP will always request that the connection use COM Port Control. If Sena Device Server agrees to use COM Port Control, only then will it become active on the current connection to the Device Server. The Serial/IP redirector indicates a successful negotiation of COM Port Control by displaying three extra “lights” next to the active COM port name in the Port Monitor window. The COM Port Control protocol includes a number of features. The set of protocol features that are supported have proven sufficient for nearly all applications with a need for some degree of port control.
