[TYPO3-mvc] extbase / fluid :: how to add an alphabetical filter/pager to list view?

[Roland]

hello,

how can you add an "alphabetical pager" (filter) to a list view (e.g. products) of an extbase-extension-frontend-plugin?

ALL | A | B | C | D | E | F | G | H | I | J | K | ...

if there is at least one product beginning with e.g. "A" the letter should link to a filtered list-view: e.g. list all products beginning with "A".

kind regards.

roland