Does landline text messages affect my phone line? Do I need to call my phone carrier for anything extra?

Business text messaging is independent of your phone service provider

Since Texty Pro Business Texting Service is independent of your phone carrier, all you have to do is simply sign up and verify your phone number to start text messaging using your landline number. No changes are made to your voice phone calls, extensions, forwarding or voicemails so you'll still be able to talk on the phone as usual.