I have a relative that having colossal problems with Digital Voice. She's been without a phone for 2 weeks since you upgraded her line. She's been told to buy a VOIP phone but has had no other help. Question is a) is this true does she need a VOIP phone and if so what phones work with Vodafone Digital Voice, and b) if this is not true what phones will work with her router. She's been sent adapters but she's been told her original phone is too old for them to work.
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If she's using the supplied vodafone router then any normal phone would work well along with the adapter vodafone should have provided. If there's no adapter @Jayach has a handy link for one on amazon, less than a fiver.
If she's using her own 3rd party router then she will indeed need a voip phone or ATA from the Grandstream range, along with all her voip details from vodafone and the rigmarole of setting it up.
It's a Vodafone router, and it's the Vodafone help desk has told her that the phone is too old. She's got a new basic phone coming today. Is the adapter just a bog standard RJ11 to RJ25? Or is it something special?