In the history of smartphones, never before had such a tone been heard at such a volume. In Android, specifically on Google-made smartphones, there's a sound that's played at the end of any phone call ...

The M-991 is a call progress tone generator integrated circuit for use in telephony systems. The circuit uses low-poser CMOS techniques to generate tones which are digitally controlled and highly ...

Recall dial tone-13 dBm0 3 bursts of 0.1 s followed by a continuous tone (note c) Recall dial tone Modern PABX only (note g)-16 dBm0 3 bursts of 0.1 s followed by a continuous tone (note c) Busy ...

Have you ever ended a phone call on your Android device and heard that loud beep? Pretty annoying right? After many requests, Google has confirmed that it will lower the volume of that Android end ...

Forget Eric Clapton's "Layla." In the Philippines, the hottest ring tone for cellular phones features what may be the voice of the country's most powerful politician, President Gloria Macapagal Arroyo ...