Hello, I’m Nathan, and I’ll be assisting you today. My livelihood depends on your positive feedback, so your satisfaction is my highest priority.
Sorry to hear you’re having trouble.
Are they not ringing? Are you unable to hear the other caller at all? What about in speakerphone mode?Can the other party still hear you?
Thank you for confirming,
there is one setting that could possibly affect this, which is the speaker volume.
While the line is ringing (not in standby, but not yet in talk mode), repeatedly press the up arrow button to increase the speaker/ringer volume.
If that doesn't do it, then the internal speaker (the larger one in the back) is faulty, and the handset would have to be replaced (they cannot be repaired).
You can order replacements here: http://amzn.to/1MUowue
However for the cost of replacing 2 handsets, you may want to just consider replacing the entire system at about the same cost, and getting a fresh warranty and updated features in the process: http://amzn.to/1KWgyjx
I am an independent technician and I've spent my personal time, unpaid, in a good faith effort to assist with the question for which you solicited my services. I am only paid for my efforts when customers such as yourself leave positive feedback for my work. Again I apologize there is not a better outcome here, though this is really beyond either of our control. I do hope you’ll consider leaving a positive rating for me, rather than “shoot the messenger”, so that I may get credit for my time spent in good faith to answer your question accurately.