OID value: 1.3.18.0.2.4.663
OID description:
External phone number.
( 1.3.18.0.2.4.663 NAME 'externalTelephoneNumber' DESC 'External phone number.' SYNTAX 1.3.6.1.4.1.1466.115.121.1.50{32} USAGE userApplications )
URL for further info: www.as400.ibm.com/ldap/schema
See also the OID Repository website reference for 1.3.18.0.2.4.663