Question about Plantronics CT 12 Cordless Phone (CT12)

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Plantronics ct12 phone no dial tone

It worked fine until the battery went dead. I purchased a replacement battery online and since then I do not have a dialtone when I turn the phone on. Also, when this phone is plugged up, my homeline rings busy. To make sure I could call out from others, I used a regular corded phone and it has a dialtone and rings in fine. can you help please? thank you!

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  • Plantronics Master
  • 37,841 Answers

It is possible that the replacement battery is no good or was installed incorrectly.

Posted on Dec 29, 2013

  • Carla W Dec 29, 2013

    i actually have took the battery out and multiple times and reinstalled and still nothing. the phone lights up and turns on but there just is not a dial tone. i wondered about the battery myself? but wasnt sure if it would be the battery or something in the phone?

  • Carla W Dec 29, 2013

    **update** i have still been trying to get this thing to work. so i disconnected the phone cord and power supply to the phone base and reconnected. i was able to get a dialtone, but when i call my home line from my cell it still gives a busy signal.. any suggestions?



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Posted on Jan 02, 2017

HDI Headsets
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SOURCE: i have plantronics t10, i

It might be that you have a cord plugged into the headset jack. Try looking at that, if that is not it, it may be the cords are not plugged into the correct spot. I am sending you the Plantronics user guide for the T10 headset.

Good luck from Headsets Direct!

Posted on Sep 01, 2011

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