DTMF was developed to cure these ills and open up a wide range of potentially lucrative services. AT&T had been working on push button dialing since the early 1940s, first using mechanical systems ...

The most of traditional systems rely on interactive voice response (IVR) and dual-tone multi-frequency (DTMF) signals, which are often said to be not fully compliant with payment card industry ...

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.

Radisys ® Corporation, a global leader of open telecom solutions, today announced that Unisys, a global technology solutions provider, has selected Radisys’ Engage Media Server to enhance its ...