Hello & Welcome,
I'm Greg and will be assisting you today.
Sorry to hear of any issue you are having with your phones.
To help you with this issue, may I ask:
1) The AGE of this system, and WHEN this issue was first noticed?
2) How many TOTAL cordless handsets do you have with this system?
3) What phone service provider (phone company) you have for this phone line?
4) If you have ANY other devices (phones, fax, etc.) attached to this same phone line and if so, are they working properly?