Hi again Jon,
Sorry for any delay.
OK - the KEY factor here is the presence of the "pulsed dial tone" - right after pressing the TALK button.
What those pulsed tones are is a "signal" - that there is a "Voicemail system" ACTIVE (from your service provider), and that there are NEW messages waiting in that system OR that system needs some kind of attention (such as needing to be set up).
Since you mentioned that you recently switch to an AT&T service, I will let you know that the most common way to access their voicemail system FROM your home phone is to
Pick up any handset and wait for the CLEAR DIAL TONE (press TALK if needed).
Dial * 9 8
When/if prompted, enter your mailbox PIN
Press 1 to listen to the messages or verbal instructions.
If those key presses DO get you into the voicemail system, then you have confirmed that their system is turned ON (active), and you will want to listen to any messages that may be stored there, and perhaps set up the system for further use (if you want to continue to use it).
You SHOULD have received a "welcome letter" (or email) from AT&T that tells you how that setup is done, and any other codes to access the system.
But if you did not get that letter or email, you can always contact the Technical Support folks (available 24 hours a day) using the following number.
AT&T Customer Support : 1(###) ###-####/strong>
Go through menu to reach Technical Support (24/7).
I hope this all makes sense and explain what steps are needed to correct this issue.
This is NOT an issue with the phones, as they are doing what they were designed to do (let you know there is a "Voicemail" message waiting).
Once all the NEW message have been listened to on the Voicemail system, that signal (pulsed tones) SHOULD go away, along with the message indicators.
If needed, contacting the Technical Support folks at your provider (usually available 24/7) should get you detailed information on how to access their system, and they should be able to configure the system for you.
Please let me know what you find or if you have ANY more questions about your phone system.
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