Here’s the real update. (Windows) and LinBPQ (Linux/macOS) are node software for packet radio, but they include native support for the PK‑232MBX as a “L1” device. BPQ handles all the TNC’s modes — even PACTOR I — and exposes the PK‑232 as a TCP‑connected KISS port.

Added to the MBX daughterboard for enhanced mailbox functionality.

require specific terminal or management software to interact with the legacy serial interface of the PK-232MBX. PK-232 Upgrade Guide - Timewave