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…
How do you transmit a continuous stream of synchronous serial data without any “idle time”?
Sealevel synchronous serial adapters are capable of a constant output stream if the application program can provide a constant stream of serial data. If…
What clocking modes do Sealevel synchronous serial adapters support?
Sealevel synchronous serial adapters support the three most common non-encoded clocking modes: The Sealevel serial adapter provides the clock using the baud rate generator…
In Windows XP Embedded, what components and drivers are required to add multiport serial adapters?
For proper enumeration of Sealevel multiport serial adapters, the following components must be included in the Microsoft Windows XP Embedded OS image build: “Class…
What is the extra data transmitted between Sealevel Ethernet Serial Servers and the SeaLINK driver?
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…
How do Sealevel synchronous serial adapters handle Manchester clock encoded data?
Manchester clock encoding (also known as split phase or bi-phase level encoding) always produces a transition at the center of the bit cell. Sealevel…
How can I optimize my SeaLINK Ethernet serial server for lower latency?
To optimize a SeaLINK Ethernet serial server for lower latency, disable Nagles algorithm on both the SeaLINK device and virtual COM port driver. SeaLINK…
Why is my Ethernet serial connection timing out or not responding fast enough?
By default, SeaLINK Ethernet serial servers use Nagle’s algorithm to reduce network traffic and increase serial data throughput, with the side effect of increasing…
How can I improve the performance of my USB to serial adapter?
Sealevel USB serial adapters are supported by the SeaCOM driver, which includes a latency timer with a default setting of 16 msec. Decreasing this…