PSTN Part 2

Contains amplifiers and circuits to replicate the functions of a traditional telephone's hybrid circuit.

• Speech Network

• Line Voltage Regulation

• Microcomputer Interface

• Microcontroller

Which component of electronic telephones automates functions like storing numbers and redialing?

• DTMF Tone Generation

• Line Voltage Regulation

• Microcontroller

• Tone Ringer

What type of signal does the Touch-tone keypad generate?

• Single-tone signal

• Quadruple-tone signal

• Triple-tone signal

• Dual-tone signal

What activates the ring tone in electronic telephones?

• 20 Hz ringing signal

• Microprocessor signal

• Speech Network signal

• DTMF signal

Which component stabilizes the voltage from the phone line in electronic telephones?

• Speech Network

• Microprocessor Integration

• Line Voltage Regulation

• DTMF Tone Generation

On February 17 of the same year, Western Union opened the first large-city exchange in San Francisco, California, and on February 21, the ______________ published the world’s first telephone directory comprised of a single page listing only 50 names.

• New Haven District Telephone Company

• New Heaven District Telephone Company

• Haven New District Telephone Company

• Heaven New District Telephone Company

What feature allows incoming calls to be automatically answered and voice messages to be stored digitally?

• Exchange

• Answering Machine (Voice Mail)

• RJ 11

• Caller ID

What technology did Almon Brown Strowger invent to automate switching calls?

• Electronic switching systems

• Step-by-step switches

• Mechanical relays

• Crossbar switches

What type of relays helped connect calls in the Strowger switch?

• Stepping relays

• Crossbar relays

• Mechanical relays

• Electronic relays

What technology replaced the old step-by-step switches in telephone companies?

• Crossbar switches

• Mechanical switches

• Analog switches

• Electronic switches