# dial tone

> Telephony signal sent by a telephone exchange or private branch exchange (PBX) to a terminating device, such as a telephone

**Wikidata**: [Q17118945](https://www.wikidata.org/wiki/Q17118945)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Dial_tone)  
**Source**: https://4ort.xyz/entity/dial-tone