VoIP Glossary
Plain-English definitions for business communications terms — from VoIP and SIP trunking to UCaaS, IVR, and auto-attendant.
What is VoIP?
VoIP (Voice over Internet Protocol) is technology that converts voice into digital data packets and ...
What is SIP Trunking?
SIP trunking (Session Initiation Protocol trunking) connects your existing on-premise PBX or phone s...
What is UCaaS?
UCaaS (Unified Communications as a Service) is a cloud delivery model that combines voice calls, vid...
What is Cloud PBX?
A Cloud PBX (Private Branch Exchange) is a business phone system hosted in the cloud rather than on ...
What is IVR?
IVR (Interactive Voice Response) is an automated phone system that interacts with callers through re...
What is an Auto-Attendant?
An auto-attendant is an automated phone system feature that answers incoming calls with a recorded g...
What is a VoIP Number?
A VoIP number is a telephone number hosted in the cloud that routes calls over the internet rather t...
What is a Virtual Phone Number?
A virtual phone number is a phone number that isn't tied to a specific physical location, SIM card, ...
What is a Toll-Free Number?
A toll-free number is a telephone number with a special prefix (800, 888, 877, 866, 855, 844, or 833...
What is Hosted VoIP?
Hosted VoIP is a phone service where all the hardware, software, and infrastructure is maintained by...
What is CCaaS?
CCaaS (Contact Center as a Service) is a cloud delivery model for contact center software — providin...
What is Call Recording?
Call recording is the process of capturing and storing audio from telephone calls for future playbac...
What is SIP?
SIP (Session Initiation Protocol) is an internet communication standard (RFC 3261) that establishes,...
VoIP vs Landline: Key Differences for Business
VoIP (Voice over Internet Protocol) transmits calls over the internet as digital data. Traditional l...
What is a Business Phone System?
A business phone system is a multi-line telephone system designed for organizations — providing feat...