What is the difference between a partyline and a wireless intercom system?

A partyline intercom runs every beltpack or station off a single wired bus, usually over a 4-pin XLR cable, so anyone plugged into that line hears everyone else on it at once. The cable itself carries the audio, so there is no RF to manage, no channel to lose, and no battery to plan around beyond the beltpack itself. It is the standard for a fixed production position: a control room, a broadcast truck, a theater with a permanent cable run. A wireless intercom replaces that cable with an RF link between a base station and beltpacks or headsets, so crew can move around a stage, a field, or a venue without a cable tethering them to a position. That freedom comes at the cost of managing range from the base station, RF interference from other equipment on site, and battery life across every beltpack in the field.

Choose partyline when positions are fixed and cable runs are practical. Choose wireless when crew needs to move: camera operators, stage managers, floor directors covering ground. Some productions run both, wired at fixed stations and wireless on moving crew, off the same system.

• Partyline needs a cable run to every position; wireless needs a base station with enough range and clear RF.
• Partyline has no channel or battery to manage beyond power; wireless beltpacks run on batteries that need charging.
• Wireless gives crew freedom of movement that a cable cannot.
• A large venue or an RF-crowded location can push a wireless system to its range or channel limit; partyline has no such ceiling.
• Many systems mix both: partyline at fixed positions, wireless on crew who need to move.