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Do you have the user manual for your phone system?
In this case you will need to do a reset and pretty much re program the system.
I have seen this model more than a few times glitch internally and lose the proper sequence of actions.
A free copy of the full manual is at this link for you in case you need it:
In any case, I will stick with you until this is complete.
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Hi I sent you an offer so we can talk, I think we can clear this up easier that way.
Really the only way to try and fix this system is by reprogramming it. But usually this is caused by a failed component in your extension phone. I know Panasonic phone systems inside and out. I also can tell you they dont last much longer than about 8 to 10 years.
I know this since I have been a hands on technician repairing these phones for over 30 years.
Hi who is your service provider?
Ok, in this case, it is the main phone control box that needs to be replaced.
Its not a programming problem Im afraid.
Fortunately you can still get a new main control box for $159.00 from this site:
You can call them and they will ship that out to you today or tomorrow:
Save with Extension: 940
I will help you program this one if you need, but it comes with the disk and easy to understand instructions it really is simple to do;-)
Please rate kindly at this time so I can stick with you, also its the only way I am credited for my time and expertise with you.
Thank you and have a great evening.
Hi, Once you rate kindly, you will be able simply reply to me on here for 30 days.
I will assist you with the programming. But its really simple, the CD walks you through it asks questions like lines extensions etc and you answer by checking the appropriate boxes.
Please remember to rate at this time;-)
Have a great day!