---
title: c-FacsimileTelephoneNumber
description: Fax phone number for a collection of entries.
component: pingds
version: 8.1
page_id: pingds:schemaref:at-c-FacsimileTelephoneNumber
canonical_url: https://docs.pingidentity.com/pingds/8.1/schemaref/at-c-FacsimileTelephoneNumber.html
---

# c-FacsimileTelephoneNumber

Fax phone number for a collection of entries.

|                             |                                                                |
| --------------------------- | -------------------------------------------------------------- |
| *OID*                       | 2.5.4.23.1                                                     |
| *Names*                     | c-FacsimileTelephoneNumber                                     |
| *Superior type*             | [facsimileTelephoneNumber](at-facsimileTelephoneNumber.html)   |
| *Syntax*                    | [FacsimileTelephoneNumber](s-FacsimileTelephoneNumber.html)    |
| *Equality matching rule*    | [caseIgnoreMatch](mr-caseIgnoreMatch.html)                     |
| *Ordering matching rule*    | [caseIgnoreOrderingMatch](mr-caseIgnoreOrderingMatch.html)     |
| *Substring matching rule*   | [caseIgnoreSubstringsMatch](mr-caseIgnoreSubstringsMatch.html) |
| *Single value*              | false: multiple values allowed                                 |
| *Collective*                | true                                                           |
| *User modification allowed* | true                                                           |
| *Usage*                     | userApplications                                               |
| *Origin*                    | [RFC 3671](https://datatracker.ietf.org/doc/html/rfc3671)      |
| *Schema file*               | 00-core.ldif                                                   |