This is the phone that started it all. In fact, more hotels use Teledex Diamond Series hotel phones than any other hotel room phone. More than 5 million in use worldwide, this analog corded telephone is available in one- and two-line models, with up to 10 programmable guest service keys, patented OneTouch voicemail retrieval technology and an optional speakerphone. The Diamond Series, like all Teledex products, are thoughtfully designed to last for years in the demanding hospitality environment. Expect to see this model in hotel rooms for years to come.