HomeGlossary📖📖GlossaryPlain-English definitions of the voice AI, telecom, and compliance terms you'll encounter when evaluating or running AI phone agents.By Catherine Weir•34 articles🔢What's the difference between local and toll-free numbers?📱What is 10DLC?🧠What is a large language model (LLM)?🖥️What is a PBX?💻What is a softphone?🤖What is A2P messaging?📞What is an AI answering service?☎️What is an AI phone agent?🧑💼What is an AI receptionist?🎙️What is an AI voice agent?🗂️What is an auto attendant?⏱️What is average handle time (AHT)?🧮What is call containment rate?↩️What is call deflection?➡️What is call forwarding?🛣️What is call routing?🏷️What is CNAM (Caller ID Name)?💬What is conversational AI?🚨What is E911?🎯What is first call resolution (FCR)?🎛️What is generative voice AI?🎯What is intent detection?🎛️What is IVR (interactive voice response)?🧭What is natural language understanding (NLU)?🔄What is number porting?🔌What is SIP trunking?⚠️What is 'Spam Likely'?🎧What is speech-to-text (STT)?🔗What is STIR/SHAKEN?🔊What is text-to-speech (TTS)?⚖️What is the TCPA?🗣️What is voice AI?🎭What is voice cloning?🌐What is VoIP?