The dial plan table index. This must be in the form of a phone number or dialing pattern containing wildcards. Available wildcards for this index are: N=2-9, M=1-8, X=0-9, [abc]=Any digit contained in the bracketed list. Ending the Dial Plan with '$' will cause the unit to stop attempting to match further input. The following rules must be observed: 1. Templates MUST have at least one NUMBER or Wildcard. 2. '(' ')' and '-' are allowed, but not inside braces '[]'. 2b. , are allowed within [], but not elsewhere. 3. Wildcards (MNX) are not allowed inside braces [], only numbers - order of numbers is not enforced, but ranges are not allowed. 4. $ is allowed but MUST be the last character or standalone. 5. If * and # are entered, they must be the first character. May not be standalone.