The addition of DSP functions, such as filtering, noise suppression and data manipulation, improves network performance. The strength and reliability of the digital signal allows it to be transmitted from the node all the way to the headend. If the operator chooses, it can create a completely passive hub architecture. While this results in higher node cost, it is offset by lower costs at the hub because there is no need for expensive receivers, transmitters, amplifiers and processing equipment. The physical hub size often can be reduced, leading to savings in maintenance and overhead.
Digital technology offers another potential cost savings.
It has the flexibility to meet the needs of various architectural requirements by allowing operators to process information where they prefer. They can use their existing hub architecture or build networks with smaller hubs or no hubs at all. Engineers can accomplish this by plugging in digital transmitters and receivers instead of analog equipment. Several major cable operators already have begun taking advantage of digital reverse path solutions. Subscribers are happier because the signal is less likely to be interrupted for maintenance.