Can you advise the model number of your Dualphone, and base station please.
There a number of known problems with the 4088 and 3088 models, and to the best of my knowledge its a case of resetting the base station on a regular basis.
Once you have confirmed the details regarding your model number I can advise you of the next steps to resolving your issues.
Can you advise what steps your falling to pair the handset?
As I understand it your getting an error after you reset the Dualphone device.
Can you please advise what steps you are performing to reset the Dualphone, and how you are trying to register (pair) the phone back to the base station?
This is not correct, there are two element which make up the Dualphone.
A base station or hub is the device which you plug the Dualphone dock into.
It sounds like your missing the base station from your setup, have a look at the video here this may help put things into perspective.
I am glad you have now got the phone paired.
To clarify when you place a call the phone shows the call on the display your just not getting a ring tone, do you hear the other party when you answer the call on the Dualphone?
So when you answered the call you could hear the caller, can you hear the caller when you place it on loud speaker.
I just want to rule out a speaker fault, as there is alot of issues with the loud speaker which is responsible for the ringing and hands free speaker.
Yes, this is a hardware failure.
This is not something caused by a software setting, but by most likely a lose wire going to the speaker.
I would suggest you contact the retailer and ask them to swap out the handset.
To clarify if the unit is still under warranty I would contact the company you originally purchased it from, as you will need to go directly to the retailer you purchased it from.
If you dont have proof of purchase, then the alternative is to buy a replacement handset, however looking at major retailers the product is end of life so you may have to buy second hand ones such as the ones here on ebay.
Appreciate if you can rate the service received, using the star rating.