telephone line

**Telephone Line**

A “telephone line” refers to the physical or virtual medium used to carry telephone signals between devices and telephone networks. Traditionally, it involves copper wires that connect homes and businesses to the public switched telephone network (PSTN), enabling voice communication. In modern contexts, telephone lines may also include digital or VoIP connections that transmit voice data over the internet. This tag is useful for posts related to telecommunications infrastructure, phone line technology, troubleshooting, installation, and maintenance tips.