Hello there and thank you for contacting Justanswer today.
I have looked into your problem for you and according to the official Gigaset manual for your S685 phone if you cannot hear a ringing / dialing tone the base stations phone cord has been replaced.
Please review the following information:
You cannot hear a ringer/dialing tone from the fixed line network:
Base station's phone cord has been replaced.
> When purchasing a new cord, ensure that it has the correct jack pin connections
Please view the following image to determine if the phone jack is wired correctly:
Incase you are confused by this troubleshooting, it appears that the phone jack you are currently using to connect to the fixed line network may not be fully functioning. Part of it however is working since you state that you are able to receive incoming calls, but it is evident that there is a problem with the connector. Unless you have recently replaced the jack, then you may need to get yourself a new phone cord, but when doing so please use the image above as guidance so that the jack is correctly assigned.
Once you have tried a new phone cord, please check to make sure that you can now hear the dialing tone correctly.
Thanks for your question, and I hope my answer has helped.
Please leave me a rating below, this would be very much appreciated!
All the best, James.
>>>> You can view the troubleshooting section I used to determine this answer in the image below <<<<
You can also view the guide I used to reference this information from at the following link: