One late night many decades ago, I chanced upon a technical description of the Touch-Tone system. The book I was reading had an explanation of how each key on a telephone sends a combination of two ...

Wireless operators are fighting a growing backlash from parents angry at the exorbitant ring tone bills their children are racking up. At work is a teenager's penchant for reckless spending, helped ...

Phones have come a long way since the old landline days. Our smartphones are light, fast, and have more computing power than NASA used to put a man on the moon.* Some advances came not by adding ...

All products featured here are independently selected by our editors and writers. If you buy something through links on our site, Gizmodo may earn an affiliate commission. Reading time 2 minutes In ...

• 9.0 PSTN operator Most organizations have, and continue to use, a 9 to access an outside line. When a 9 is dialed, a secondary dial tone (stutter tone) is heard. Some legacy PBX (private branch ...

Does a cellphone have a dial tone? Mobile cellphone never have a dial tone. Before the cellphone came into common usage, a dial tone on a landline told you that the line was available; however, it is ...

Wireless operators are fighting a growing backlash from parents angry at the exorbitant ring tone bills their children are racking up. At work is a teenager's penchant for reckless spending, helped ...