define an attribute syntax for storing telephone number information. 1.3.6.1.4.1.26027.1.2.4 ds-cfg-telephone-number-attribute-syntax ds-cfg-attribute-syntax org.opends.server.schema.TelephoneNumberSyntax Indicates whether to require telephone number values to strictly comply with the standard definition for this syntax. false 1.3.6.1.4.1.26027.1.1.121 ds-cfg-strict-telephone-number-format