If you’ve ever wondered about the best way to detect dial and DTMF tones from a phone line, [Debraj] is your man. [Debraj] built a DTMF detector using the Goertzel algorithm. Normally ...

and dual-tone multi-frequency (DTMF) signal detection. Unisys chose Radisys’ Engage Media Server for its ability to deliver robust performance in virtualized and cloud-based deployments.

The Si3226 and Si3227 include the voice codecs, DTMF detection, and signal generation functions needed for two complete analog telephone interfaces. All the BORSCHT functions are supported as well.

Low battery detection and automatic low battery disconnect. Telephone line supervision and reporting. Caller ID, calling name and DNIS. Communicates in all major ITI formats, all common pulse formats, ...