SIP Protocol
what Does SIP Stand for?
Session Internet protocol
What does PBX stand for?
(Private Branch Exchange)
Name one benefit of Cloud PBX
Scalability and lower upfront costs
What does VoIP stand for?
Voice over Internet Protocol)
What is an SBC in UC?
Session Border Controller)
Name one SIP request method.
(INVITE, ACK, BYE, CANCEL, REGISTER)
Name one difference between IP-PBX and traditional PBX.
IP-PBX uses VoIP; Traditional PBX uses PSTN
What is an SBC used for?
Security and interoperability for VoIP networks)
What is the role of an RTP stream?
Handles media transmission in VoIP calls)
Name one function of an SBC.
Protects VoIP networks from attacks and ensures interoperability
what is the default SIP port?
The default SIP port is 5060. This port is used for SIP signaling over UDP (User Datagram Protocol) and TCP (Transmission Control Protocol). Additionally, 5061 is often used for secure SIP signaling over TLS (Transport Layer Security).
What is an Auto Attendant?
A system that answers and routes calls automatically
How does Cloud PBX reduce costs?
(Eliminates on-prem hardware and maintenance
How does QoS affect VoIP?
Prioritizes voice traffic to reduce latency and jitter)
How does an SBC prevent VoIP fraud?
Monitors call patterns and blocks unauthorized traffic)
what does a SIP Trunk do?
A SIP Trunk (Session Initiation Protocol Trunk) acts as a virtual version of an analog phone line. Instead of using traditional telephone lines, it utilizes the internet to connect a private branch exchange (PBX) to the telephone network.
How does Call Forwarding work?
(Redirects calls to another number or extension)
Name one security risk in Cloud PBX.
VoIP hacking, DDoS attacks, eavesdroppin
Name one VoIP codec and its purpose?
G.711 for high-quality calls, G.729 for bandwidth efficiency
What is the role of TLS in VoIP security?
Encrypts SIP signaling for secure communication
how does SIP handle call transfer?
(Using REFER or Re-INVITE methods)
What is a Hunt Group in PBX?
A group of extensions that receive incoming calls in sequence or simultaneously)
How does Hybrid PBX work?
Combines on-prem PBX with cloud-based functionality
What is the main cause of jitter in VoIP calls?
Network congestion and packet delay variation
What does NAT traversal mean in SIP calls?
Allows SIP traffic to pass through firewalls and private networks