What is the difference between digital service and landline phone service?
DIGITAL phone service is like AT&T's U-verse, Frontier, Fairfield, and Wind Stream phone services, VoIP broadband analog adapters for Ooma, Vonage, Magic Jack, etc. Note that actual IP digital phone sets requiring DHCP service will not work with analog devices like the Call Blocker. Also covered are Verizon cellular receivers for landlines. These types of phone services require other proprietary devices (digital converters) to provide analog telephone service.
LANDLINES are normal analog POTS line (plain ole telephone service) copper pair, without need of a digital converter (above) for businesses or home use. It also covers FIOS, DSL and Cable modems with Phone ports supplied from your telephone company.