Panasonic BB-GT1500B Globarange Expandable Cordless Telephone with Point-to-Point Internet Calling (US) Do you want the convenience and flexibility of both a landline and peer-to-peer internet calling in one easy to use cordless phone? With the revolutionary new Panasonic Globarange BB-GT1500 cordless phone system you get both a regular landline phone and an peer-to-peer Internet phone line–utilizing joip telephony service–that lets you make free domestic and international calls between Globarange phones around the world for three years with joip service.¹ That’s a total of two lines: one landline and one peer-to-peer Internet phone line.²