Function: Used for connecting telephone landlines and receiver handles, enabling reliable handset operation. Compatibility: The telephone receiver cable is suitable for all brands of telephones. Cable type and connectors: Uncoiled completed landline telephone hand set cord line cable with RJ9 RJ11 RJ22 4P4C connectors; acts as a standard telephone accessory. Construction and features: Landline telephone receiver line, spring wire, coil wire, and telephone handle line designed for durability and flexibility; compatible as a RJ9 4P4C telephone accessory. Use scenarios: 1) Replacing a worn or damaged handset cord on a home landline phone. 2) Providing a universal replacement cord in an office with multiple telephone brands. 3) Onsite maintenance in a small call center to standardize handset connections across devices.