!!! Overview
[{$pagename}] [SUBSTR] [Matching Rule] compares an [Assertion Value] of the Substring Assertion syntax to an [Attribute Value] of a syntax  (e.g., the Telephone Number syntax) whose corresponding [ASN.1] type is a [PrintableString] representing a [Telephone Number].

The rule evaluates to [TRUE] if and only if all of these are met: 
* the prepared substrings of the [Assertion Value] match disjoint portions of the prepared [Attribute Value] character string in the order of the substrings in the [Assertion Value], 
* an <initial> substring, if present, matches the beginning of the prepared attribute value character string, and
* a <final> substring, if present, matches the end of the prepared attribute value character string.  A prepared substring matches a portion of the prepared attribute value character string if corresponding characters have the same code point.In preparing the [Attribute Value] and [Assertion Value] substrings for comparison, characters are case folded in the Map preparation step, and only [RFC 4518] telephoneNumber Insignificant Character Handling is applied in the Insignificant Character Handling step.

!! LDAP [{$pagename}] 
In LDAP [{$pagename}] is a [Matching Rule] defined as:
* [OID]: [2.5.13.21]
* [NAME]: [{$pagename}]
* [SYNTAX]: [1.3.6.1.4.1.1466.115.121.1.58]The LDAP definition for the telephoneNumberSubstringsMatch matching rule is:

The telephoneNumberSubstringsMatch rule is a [SUBSTR] matching rule.!! More Information
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[{ReferringPagesPlugin before='*' after='\n' }]