Analog Recording Options: Compatible directly into analog wall jack Compatible between handset and phone using an analog phone
Digital Recording Options: Compatible between handset and phone using most digital phones. (Most digital phone allow analog audio to pass between handset and phone)
Contents of ECS-DUPR: (1) Telephone recording control box, (1) 7 foot RJ11 phone cable, (1) RJ11 "T" connector, (1) Coiled handset cord (1) 7 foot 3.5 mm male to male audio cable