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Extension Dialing

The Extension Dialing Node

the Extension Dialing node

The Extension Dialing node prompts users to enter an extension number to be connected to.

Extension Dialing Sidebar

The collected digits, along with the prefix, are stored in an internal buffer for the number to be connected to if checks succeed.

Should the user enter a number that is allowed, the call will be connected. If the call completes successfully, the flow ends. Otherwise, the Busy/No Answer exit is taken.

When the user does not enter an allowed number, the node will reprompt the user to enter a number until Max. Iterations is reached.

If Max Iterations is exceeded, the flow will exit down the appropriate branch for the most recent failure condition, i.e. Insufficient Digits or No Match.

Announcements must be selected for the Main announcement, as well as the Reprompt announcement.

The minimum and maximum number of digits that are allowed to be entered must also be specified.

The prefix that is prepended to the entered digits may optionally be specified.

If additional configuration options are required, select the arrow icon in the header to display them:

Additional Configuration

Max. Iterations refers to the total number of attempts the user is permitted before the failure branches are followed.

Both the End Char and the Cancel Char may be disabled if required.

Additionally, the timeout value may be specified in order to override the SRF default timer.

Destination Patterns

One or more extension dialing pattern must be defined in the extension dialing node. Extension patterns are used to verify that an extension number entered by the user is allowed to be used, and what prefix to the extension dialled should be used.

For example, this may verify that the entered extension is 3 digits long and the first digit is 1.

Destination patterns are a form of regular expressions. Pattern matching rules are:

Character	Description
[123]	Match one of any character defined in the set, or within any defined range in the set. For example: `[0-9]` will match all digits 0-9.
^121	The `^` indicates the start of the extension digits. This pattern will match any digits beginning with 121.
9$	The `$` indicates the end of the extension digits. This pattern will match any digits ending with 9.
9?	The `?` represents matching "zero or one" of the preceding character.
123*	The `*` matches zero or more of the preceding character. This example matches `12` and then any number of 3's (including 0).
123+	The `+` matches one or more of the preceding character. This example matches `123` and then any number of additional 3's (including 0).
.	Match any value. This example would match any digit.

Examples:

Example Pattern	Description	Example Matches
121	Match `121` somewhere in the extension dialled. The digits can appear anywhere in the entered extension string.	`121`
^121	Match when the extension digits start with `121`. The digits after the `121` is not verified/checked.	`1211`
^12[1-4]	Match when the extension digits start with (or are exactly) `121`, `122`, `123`, or `124`.	`1211`
^12[1-4]$/td>	Match when the extension dialled is exactly `121`, `122`, `123`, or `124`.	`121`
^02[1-4].$	Match when the extension dialled starts with `121`, `122`, `123`, or `124`, and is at least four digits long.	`1211`, `1219`

Configuration

To configure the node:

Select the Main announcement that is played to the user when the node is first encountered.
Select the Reprompt announcement that is played to the user after an incorrect code is entered.
Enter the minimum number of digits that the entered number must be.
Enter the maximum number of digits that the entered number may be.
If required, enter the Prefix to be prepended to the entered digits.
If required, add or remove Destination pattern entries.
If required, set a new value for Max Iterations.
If required, set a new value for Timeout.
If required, set a new value for End Char.
If required, set a new value for Cancel Char.

Note that both announcements and minimum and maximum digits must be selected.