What are the names of the two wires used by a traditional home phone to carry voice traffic and signaling information? (Select two.)
Ground
Tip
Magneto
Ring
Who invented the first direct-dial telephone switch?
Thomas Watson
Almond Brown Strowger
Alexander Graham Bell
Harry Nyquist
Which type of telephone switch is most appropriate for a business needing to support 10,000 phones?
CO switch
Key system
PBX
Ethernet switch
Identify three types of signaling used on PSTN networks.
Information
Address
Fallback
Supervisory
How many voice channels can be carried over a T1 circuit in a traditional PSTN/PBX environment?
16
24
30
64
"Dial tone" is an example of which type of signaling?
Which of the following are potential advantages of a VoIP network? (Select three.)
Reduced dedicated circuit costs
More mature technology than PBX/key system approaches
Lays a foundation for more advanced services
Reduced physical plant costs
How much voltage does a telephone switch apply across the tip and ring wires?
-48 volts of DC
-48 volts of AC
+90 volts of DC
+90 volts of AC
Which VoIP component is used to forward calls between different types of networks?
Call agent
Gatekeeper
Gateway
MCU
Which VoIP component is used to mix multiple audio streams?