BT Diverse product compatibility

[pjohnpope]

My trusty BT Diverse 5200, purchased about 20 years ago with base unit plus three extensions is still going strong, but I need to add another extension. Please can anybody tell me which later extension units are compatible ?

[rbz5416]

Any DECT handset that is GAP compliant will be "compatible", in that it will pair with the base & make/receive calls. But to make use of the features like the contacts list, it will likely need to be the same model. That pretty much limits you to getting lucky on Ebay.