This is the phone that started it all. In fact, more hotels use Teledex Diamond Series hotel phones than any other guestroom telephones. With over 5 million in service worldwide, this corded analog phone is available in single or two-line models, with up to 10 programmable guest service keys, patented OneTouch voice mail retrieval technology, and an optional speakerphone. 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.