Baud meaning

Baud (or baud rate) describes, in telecoms contracting and expert evidence, the signalling rate on a communications line: the number of discrete symbols (signal changes) transmitted per second. It is a technical, descriptive term rather than a defined legal term, and is not defined in UK or Irish legislation or case law. Baud differs from data rate measured in bits per second (bps). A single symbol can represent multiple bits using modulation. For example, a circuit operating at 2,400 baud may deliver 9,600 bps if each symbol carries four bits. Older documents may treat baud and bps as equivalent; this can misstate performance, warranties, acceptance criteria or service levels. Usage is broadly consistent across England & Wales, Scotland, Northern Ireland and Ireland. The term commonly appears in procurement specifications, telecoms service level agreements, hardware/technical schedules (for example RS‑232 serial ports), and forensic or technical evidence concerning legacy modems and communications software. When drafting or construing contracts, specify whether limits are in baud or bps, state the assumed modulation/coding, and clarify whether measures are minimum, average or peak. Regulatory and industry standards (for example Ofcom/ComReg materials, ITU‑T recommendations) typically express throughput in bps rather than baud.