# ISDN User Part

> Concept in telephony

**Wikidata**: [Q3491978](https://www.wikidata.org/wiki/Q3491978)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/ISDN_User_Part)  
**Source**: https://4ort.xyz/entity/isdn-user-part


## References

1. Freebase Data Dumps. 2013