Call Center Hosting VoIP & Telephony Fundamentals

Question 1

What does VoIP stand for?

Accepted Answer

Voice over Internet Protocol

Answer

VoIP stands for Voice over Internet Protocol, the technology that transmits voice calls as data packets over IP networks.

Question 2

Which protocol is most commonly used to establish, modify, and terminate VoIP sessions in call centers?

Accepted Answer

SIP

Answer

SIP (Session Initiation Protocol) is the standard signaling protocol used to set up and tear down VoIP calls.

Question 3

What does a SIP trunk provide to a hosted call center?

Accepted Answer

Virtual phone lines that carry calls over the internet

Answer

A SIP trunk delivers virtual telephone lines over the internet, connecting a call center's PBX or CCaaS platform to the PSTN.

Question 4

Which codec is widely used in VoIP call centers and provides a balance between voice quality and bandwidth usage?

Accepted Answer

G.729

Answer

G.729 compresses voice data to ~8 kbps, offering a good balance between call quality and bandwidth consumption.

Question 5

What is the PSTN?

Accepted Answer

Public Switched Telephone Network

Answer

The PSTN is the Public Switched Telephone Network — the global circuit-switched telephone infrastructure.

Call Center Hosting Practice Test