Landline Phone Features

I see a list of outgoing calls placed from my landline (voip) home phone. HOWEVER, I do not use my landline for outgoing calls.Does this mean someone else has figured out how to use my phone without actually using my home phone?And, if so, (1) how do I prevent someone else from doing this, and (2) d

How I get rid of a Message "BASE LINE IN USE" and "HANDSET LINE IN USE" on my phone Model CL83464?

During setup of DLP73410, inadvertently entered the wrong phone number for voicemail access. I need to correct that phone number but have found no way to do that.  Receive a message that it is an invalid number.  This is followed by loud dial tone like noise that I cannot turn off. 

Background: I have a Landline == POT (Plain Old Telephone) Not digital, connected to the wall, not a modem or router. Question:  How do I disable Call Waiting for all calls? *70#  works, but I have to enter it for every out going call *370# only works for digital connections (i.e. p

After pressing a Line button on the handheld unit, the dial tone is very low volume. It used to be load. How do I fix this?

How can I change the number of rings on my voice mail landline phone

We have had the ATT CLP99486 since 2016 and the CID worked. A couple of weeks ago it stopped displaying the callers phone number and just said UNKNOWN.  I purchased a newer ATT model - DLP73410 thinking that would solve the problem but it didn't.  The new model didn't even show UNKNOWN -

I just bought a new AT&T BL102-4 DECT 6.0 4-Handset Cordless Phone for Home to replace my old AT&T CL82353 model. My question is whether there's a way to automate the transfer of my existing contact directory to the new phone.

Does att landline still provide a recorded message with the new phone number, when it has been changed?

I, and many of my friends, have owned legacy AT&T products. It's been hard for me to find the user manuals (some have text-only manuals, or cannot be found at all). Some of the manuals I'm after are: 4315 4695 5655 5700 1545 1845 7620 7640 822 If anyone knows where the actual PDFs