In observance of Labor Day, Express Systems will be closing early on Friday, September 4th and will be closed on Monday, September 7th. We will resume normal business hours on Tuesday, September 8, 2026 at 9:00am EST.
We wish our customers, partners, and their families a safe, relaxing, and enjoyable holiday weekend. Thank you to the hardworking people who keep our communities connected every day!
Serial cards deliver reliable, cost-effective and high serial port expansion; multiple form factors are available. Serial cards will enable you to easily add RS232, RS422, RS485 serial or parallel ports to your PC or server.
