DAC is designed around the Motorola encryption keys and use only on Moto compatible STBs. DNCS is designed around PowerKey encryption keys and use only on SA compatible STBs.

DAC - Digital addressable controller - This is the headend (media) component provided by arris (originally by Motorola). DNCS - Digital network control system - This is headend provided by Cisco (originally by Scientific Atlanta). These headend systems are responsible for managing STB's and subscriber database along with many other featured.

DAC - Digital addressable controller - This is the headend (media) component provided by arris (originally by Motorola). DNCS - Digital network control system - This is headend provided by Cisco (originally by Scientific Atlanta). These headend systems are responsible for managing STB's and subscriber database along with many other featured.