Asterisk Project : Adding to an existing section

If you want to add settings to an existing section of a configuration file (either later in the file, or when using the #include and #exec constructs), add a plus sign in parentheses after the section heading, as shown below:

[section-name]
setting1=value1

[section-name](+)
setting2=value2

This example shows that the setting2 setting was added to the existing section of the configuration file.