Hello & Welcome to Just Answer,
I'm Greg and will do my best to assist you today.
Sorry I didn't see your question earlier and to hear of any issue you are having with your phones.
To help you with this issue, may I ask:
1) Can you CONFIRM the FULL Model Number of the phone system you are working with? I only ask because I'm not finding the model sent, and a few of the numbers may have been transposed.
2) Do you have a FULL manual for this system, or just a "Quick Guide"?
Please REPLY using the box below and the SEND button.