A Dialing Plan is a set of rules that defines how phone numbers are formatted and processed within a telecommunications system. It specifies the structure of phone numbers, including area codes, country codes, and the number of digits required for local calls. This ensures that calls are routed correctly and efficiently. In modern systems, a dialing plan can also include features like call forwarding and voicemail access. It is essential for both traditional landline networks and mobile networks, helping users connect with others seamlessly. Properly implemented dialing plans enhance communication and reduce dialing errors.