A:AnswerYes. Standard landline phone service will work. This all has been standardized so everything works together since the 60s. Special services from your phone company might not, but basic calling will.
A:AnswerAdjusting the volume is somewhat difficult, especially if you are hearing impaired. Unfortunately, I could not find a way to accomplish what you are trying to do. maybe someone else might be able to assist you with your issue. Sorry.