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!
The TCF-142 media converters are equipped with a multiple interface circuit that can handle RS-232 or RS-422/485 serial interfaces and multi-mode or single-mode fiber. TCF-142 converters are used to extend serial transmission up to 5 km (TCF-142-M with multi-mode fiber) or up to 40 km (TCF-142-S with single-mode fiber). The TCF-142 converters can be configured to convert either RS-232 signals, or RS-422/485 signals, but not both at the same time.
