scope:

This Recommendation defines the Filter Group package. Using this package, the MGC can create and manage groups of filters, then apply those filter-groups to the MG's terminations and streams. The package is especially useful when large groups of related filters are called for, as it allows the MGC to manipulate the individual filters without having to repeat them all in each H.248 command.

The Filter Group package provides protocol elements and procedures for:

- Creating groups of filters.

- Adding and removing filters to and from an existing filter-group.

- Modifying an existing filter.

- Assigning multiple filter-groups to any of the MG's terminations or streams.

- Collecting statistics regarding filters and filter-groups.

The Filter Group package does not, however, provide any protocol elements covering a filter's concrete match conditions or actions. Instead, the package should be combined with other packages that provide such elements, e.g. the packages defined by [ITU-T H.248.43].