I have a WordPress website that publishes articles on a daily basis. I have connected the website with a VOIP provider because some users want to access the website's content by phone (they are visually impaired).

The users dial a landline number and listen to the latest posts. The VOIP provider fetches only a certain number of posts for each article category. The VoIP provider does that using WordPress RSS built-in engine.

So when a user visits a specific category page, he listens to the latest posts. When he selects to listen to older posts he is being directed to the beginning. My VoIP provider told me that I have to edit the RSS commands and make the RSS fetch older articles if requested.

I hope my post makes sense. What do I have to do?

I am trying to see IF I can do this through a WordPress plugin. I am reading some articles but none seems to address that issue. Except if I am missing something.