In the video below, a member of the Sealevel support team walks through the process of setting up a loopback test for a PCIe Asynchronous…
How do you patch the 8250_exar driver in RHEL 8 and 9 for Sealevel XR17V35X cards?
This is intended for RHEL 8 and RHEL 9 users impacted by the communication issues described in this support article regarding Sealevel’s XR17V35X-based serial devices (7xxxec serial…
Is the 7203e PCIe serial interface dip switch or software configurable to change the RS-485 termination from a 120 Ohm resistor to an AC termination?
Sealevel’s 7203e does have onboard dip switches that would allow you to turn off the 102 Ohm resistor; the 120 Ohm resistor can be changed through dip…
Sync Serial Cards: 5104 vs 5102
The 5104 is our highest speed sync card. For high-speed communications, it is the perfect solution. Unfortunately, if you’re using async mode it’s not necessarily…
What is asynchronous communication?
The important thing with asynchronous communication is the fact that since it is time-based, the transmitter and the receiver both have to be very accurately…
My Ethernet Serial Server is missing from the SeaLINK Device Discovery utility. How do I find it?
The most common solution is to disable all network adapters except for the one connected to the Ethernet Serial server, then try searching for the…
How to resolve communication issues affecting Sealevel’s XR17V35X based serial devices (7xxxec serial cards, 7106e, Relio R1)?
This article is known to apply to the following Sealevel devices: This article is known to apply to the following kernel versions: Symptoms: Cause: Sealevel…
Can I use a PCI or PCIe serial port as a replacement for COM1?
Using Sealevel’s COM Port Manager utility provided with our SeaCOM software suite, a PCI or PCIe serial port can be named “COM1.” After that is…
How can I test to see if data is going through my serial tunnel?
A serial tunnel is formed by two Ethernet serial servers that transmit data received by the local serial port through a TCP/IP connection out…