jvser (Java Virtual Serial Port) is a Java library implementing the client side of the RFC 2217 protocol.

RFC 2217 defines a TCP protocol for virtualizing traditional serial ports over a telnet stream. This allows clients to connect to remote serial lines using access servers that support this protocol.

jvser provides the TelnetSerialPort class which implements the Java standard javax.comm.SerialPort API, and so is backward compatible with existing Java software that works with serial ports.