USB RS232 to RJ11/RJ12 Converter Cable

A converter for equipment that speaks serial over an RJ11 or RJ12 jack rather than a DB9. The USB end goes into the computer and the RJ11/RJ12 end into the device, giving legacy serial gear a modern connection without an external power brick — it draws everything it needs from the USB bus.

It is built around the FT232 and ZT213 chips, which give robust serial connectivity to legacy PCs and an extensive list of compatible operating systems, so it suits almost any RJ11 application. Serial data runs at up to 1 Mbit/s.

Key features

• USB to straight-through RJ11/RJ12 serial adapter
• FT232 + ZT213 chipset
• USB bus-powered — no external adapter
• Serial data rates up to 1 Mbit/s
• Thin cable, light and portable
• Broad operating-system compatibility for legacy gear

Specifications

Two notes. RJ11/RJ12 is a modular jack, and the wiring is straight-through — check your device’s pinout against the adapter, since not every RJ11 serial device uses the same pin order. And this is a serial data cable; it is not a telephone or modem line adapter.

Typical applications

• Legacy serial equipment with an RJ11/RJ12 port
• POS and access-control systems using modular jacks
• Console and service-port connections

Custom and OEM options

Connector type, cable length, chipset variant, jacket colour, printed logo and retail packaging with your own artwork can all be specified. Standard items from 100 pcs, custom builds from 500 pcs, free samples, production in 20–25 working days.

FAQ

Is it a modem cable?
No. It is a serial data cable for equipment with an RJ11/RJ12 serial port, not a telephone or line adapter.

Does it need a power supply?
No. It draws power from the USB connection.

Samples, packing options, payment terms and warranty conditions are set out in How to Order and Delivery Information.