Voice over IP (VoIP) Flashcards
6 cards from real Telecommunications practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Voice over IP (VoIP) flashcards as text
What is a PBX in the context of business telephony?
Answer: Private Branch Exchange
A PBX (Private Branch Exchange) is a private telephone network used within an organization to manage internal and external calls.
What is E.164 number formatting used for?
Answer: Standardizing international telephone numbers
E.164 is the ITU-T standard that defines the format for international telephone numbers (e.g., +1-800-555-0100).
Which transport protocol does SIP most commonly use?
Answer: UDP or TCP
SIP can use UDP for low-overhead signaling or TCP for reliable delivery, with the choice depending on deployment needs.
What does PSTN stand for?
Answer: Public Switched Telephone Network
PSTN (Public Switched Telephone Network) is the worldwide circuit-switched telephone network, also known as POTS.
What is G.729 commonly used for in VoIP?
Answer: Low-bandwidth compressed voice at 8 kbps
G.729 compresses voice to 8 kbps using CS-ACELP, making it ideal for bandwidth-constrained VoIP deployments.
What is the function of a VoIP gateway?
Answer: Convert between VoIP and PSTN/analog signals
A VoIP gateway converts voice signals between IP-based VoIP networks and traditional analog or digital PSTN circuits.