You've probably heard the joke by now. A 20-something job applicant or apartment hunter or a long-suffering customer support victim is talking to someone who asks him, "and what's you're landline number?" To which the young man replies, "what the hell is a landline?" But niche hardware company Obihai aims to bring back the home phone with its line of VOIP phones and adapters that use your broadband connection to make and receive calls without a landline.

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