For those who are both hearing and visually impaired using the phone can be very difficult. Getting to the phone and operating the phone can be harder on top of this if one has had a stroke or has COPD or another disabling medical condition.
If you are on a fixed income or enrolled with DSHS, the CapTel program with WA State provides an accessible phone for dually impaired individuals. You do not need Internet access.
For more information http://www.captel.com/states/washington/