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Use a different BT cordless phone with an existing base

The UK’s ageing and unreliable copper landline network is being retired.
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Further information and support are available on our Connected Together website, or by calling 0330 1234 150.

To find out if you can use a different type of BT cordless phone with your base, you need to know if it is GAP compatible. To check, go to the user guide for your phone. If your phone is not GAP compatible, you can only use extra phones that are the same model. If your phone is GAP compatible.......

To find out if you can use a different type of BT cordless phone with your base, you need to know if it is Generic Access Protocol (GAP) compatible. To check, go to the user guide for your phone.

GAP-compatible means a phone is designed to work with other Digital Enhanced Cordless Telecommunications (DECT) devices, regardless of manufacturer.

If your phone is not GAP compatible

  • You can only use extra phones that are the same model and make as your base.

If your phone is GAP compatible

  • You should be able to register your phone with the base, but not all features are guaranteed to work.
  • Phones that are GAP compatible are only required to:
    • make and receive calls
    • ring for incoming internal, external and paging calls.
  • In most cases, the phone will show Caller Display information, but it is not mandatory.

There is also a limit to the number of phones that you can register to a base.

For more information, see the user guide for your phone.

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