A digital telephony answering machine (DTAM), also known as a telephone answering device (TAD), activates an outgoing message when a call is not answered. It then digitally records a voice message left by the caller that can later be heard by the called party.
A DTAM can either be integrated into a digital cordless base or operate as a stand-alone device. In either case, a DTAM is installed at the customer's premises, and connected to the existing telephone line.
Service providers can also utilize a DTAM to implement a centralized, network-based voice mail service, which requires simultaneous multi-recording and playback capabilities.
A digital voice recorder (DVR) offers the same functionality as a DTAM, but does not require all the telephony functionality available in the latter.
DSP Group®'s chipset is ideally suited for DTAM and DVR applications, whether as a stand-alone device or at the service provider's site. Both applications do not require radio transmission, and therefore, just a digital baseband chip without an RF chip is needed. DSP Group's silicon, hardware and software reference design enables customers to develop stand-alone DTAM and DVR products at a lower effort and faster time to market than alternative solutions.