Most hardware Ethernet-to-serial servers can only send data between the application and serial device. In order to send and receive serial control signals (such as DTR and DCD), a serial server must support the COM Port Control Protocol (RFC 2217).Some serial-based applications and the devices they connect to, expect to see hardware control signals just as if they were directly connected to an RS-232 port. When using these applications and devices, it is imperative that you use a serial server that supports the COM Port Control Protocol. The following serial servers support the COM Port Control Protocol:Acksys ComethAtop GW SeriesAxis 2490B&B Electronics ESR SeriesComtrol DeviceMaster RTS
CXR TS SeriesCyclades TS Series, Alterpath ACSDigi TS SeriesDigital Networks DECserver, CserverGarrettCom DX SeriesMoxa Nport 5600MRV LX SeriesPerle IOLANPrecidia Ether232Plus, iPocket232, Cell232PlusRayon GPORT 104, 108 and 116SeaLevel SeaLink SeriesSena PS, SS and STS Series, LS110Vizimax, Inc. RightWON SeriesTactical Software has a software product called TacServe Modem Pool Server, which turns a Windows PC with one or more hardware serial ports into an RFC 2217 compliant serial server.When using a serial server that supports the COM Port Control Protocol, make sure that Serial/IP is set to Telnet mode under Connection Protocol. The Serial/IP Auto Configure feature will detect and report the presence of the COM Port Control Protocol.If the Auto Configure does not detect the COM Port Control Protocol when connecting to one of the above devices, make sure that the serial server is configured correctly to accept this protocol.