Sealevel USB serial adapters are supported by the SeaCOM driver, which includes a latency timer with a default setting of 16 msec. Decreasing this value reduces the amount of time a USB device buffers data before completing a write to the host computer, which…

The extra data is non-serial Telnet command messages such as COM port settings and modem control signals. SeaLINK devices communicate using the RFC-2217 Telnet Com Port Control protocol so they also send control sequences and certain bytes in a Telnet compliant…

SeaLINK Ethernet serial servers use RFC-2217, the Telnet COM port control protocol, to transmit modem control signals in serial tunneling mode. Since SeaLINK Ethernet serial servers are DTE devices, they follow standard null-modem conventions to tunnel output…

Sealevel SeaLINK Ethernet serial servers support a 2-byte format to marshal 9-bit serial data between the host computer and the serial server. The least significant bit of the first byte is the 9th bit of the serial frame and the second byte is the first…

Microsoft Windows maintains the configuration (enumeration) information for every USB device that has ever been connected, unless you explicitly uninstalled the device before unplugging it. When a USB device is not physically connected to the computer, Windows…

Most Sealevel serial adapters use the serial drivers built into the Linux kernel. For USB and UART-based serial adapters, the Linux drivers may need additional information in order to provide access to the Sealevel serial device. For SeaLINK Ethernet serial…

When you connect a USB serial adapter to a computer, the operating system assigns individual COM port numbers to each serial port. Each USB serial adapter has a unique ID and the COM port numbers are retained even when the adapter is disconnected. When you…