---
type: concept
title: Functional Phone Number
tags: [telephony, communication]
related: [telefonie, persoenliche-rufnummer]
created: 2026-06-30
updated: 2026-06-30
sources: ["output/rz_uni_greifswald_de_dienste_technische_infrastruktur_telefonie.md"]
---
# Functional Phone Number

A **Functional Phone Number** (*Funktionsnummer*) is a telecommunications identifier assigned to a specific role, department, or physical location (e.g., a laboratory phone) rather than an individual.

## Constraints and Requirements
- **No Private Calls**: Functional numbers cannot be used for private telephone conversations.
- **Device Binding**: These numbers cannot be logged out of one end-device and moved to another.
- **Responsibility**: To ensure administrative continuity, at least two responsible persons must be designated for every functional number.

## Comparison
Functional numbers are more restricted than [[persoenliche-rufnummer]] in terms of usage and mobility.