Recommendations for the Dial Plan feature

Last Updated : Apr 02, 2018 |

To derive maximum benefits of the Dial Plan feature, ensure that:

  • The maximum length of the prefixed extensions assigned to intercom list is 5 digits. The maximum length is inclusive of the digits of a prefix.

  • The maximum length of data-channel extensions is equal to the maximum number of digits that the system supports for an extension. Extensions with an identical first digit may have different lengths. Administering data-channel extensions with the maximum supported length ensures that issues related to time-out for data calls that Communication Manager automatically sets up are avoided. CDR link is an example of the data-channel extension.

  • An extension and a FAC contain identical first digits only if the length of the extensions is more, and the extensions are not used to send AAR/ARS faxes.

  • Multiple FACs do not contain identical first digits when you create a new dial plan or add information to an existing dial plan. The system distinguishes between FACs with the same first digit by using the Short Interdigit Timer value on the Feature Related System Parameters screen.