Phone alternatives, when available, have been beset with their own issues, such as long hold times and not being available at all hours like websites. Just won

Phone alternatives, when available, have been beset with their own issues, such as long hold times and not being available at all hours like websites. Just wondering, does the ADA require equal access, or a "reasonable accommodation", like a phone call center? I agree that the websites should be made accessible to the visually (or otherwise) impaired, but does the ADA actually require it?