Blogs
- Vobiz Blog — Guides, deep-dives, and product updates from the Vobiz team - voice AI engineering, telephony best practices, and platform announcements
Articles
- Phone numbers
- What Is a Toll-Free Number? 1800 Numbers in India — A toll-free number lets customers call you at no charge while your business pays
- What Is a 140 Phone Number? Why They Call, and 1600 Numbers — A 140 phone number is India’s series for promotional calls
- Telephone Numbers in India: Every Number Type Explained — Telephone numbers in India explained: mobile, landline, 1800, 1860, 140, 1600 and 1601
- What Is CNAP? Caller Name Display in India Explained — CNAP shows a caller’s registered name on Indian phones from November 2026
- What Is a Landline Number? Meaning, Format & Dialling — A landline number is a fixed-line phone number linked to an area code
- What Is a Virtual Phone Number? Types & Uses (2026) — How virtual phone numbers route calls over VoIP with no SIM or copper line: local, toll-free, mobile and vanity types, provisioning, porting, and..
- What Is Number Masking? Two-Way Call Masking — Number masking hides both parties’ real phone numbers behind a proxy DID
- What Is a DID Number? Direct Inward Dialing (2026) — Direct Inward Dialing explained: how a DID maps to a SIP endpoint or webhook, E.164 format, DID vs virtual and toll-free numbers, porting, and voice..
- What Is E.164 Phone Number Formatting? (2026) — E.164 is the global standard for phone numbers: +country code, up to 15 digits, no leading zeros
- What Is Caller ID and CNAM? How Name Display Works — Caller ID shows the number; CNAM shows the name
- Toll-Free vs Local vs Mobile Numbers: The 2026 Guide — Toll-free, local, or mobile? Who pays for each call, outbound answer rates, SMS registration (10DLC, toll-free verification), and when to mix all..
- Calls and contact centers
- CDR Full Form: What a Call Detail Record Contains — CDR full form in telecom is call detail record: a per-call log of numbers, times, outcome and cost, with no audio
- What Is Call Forwarding? How It Differs From Call Transfer — Call forwarding sends a call to another number before anyone answers
- What Is a Missed Call Service? How Businesses Use It — A missed call service turns one unanswered ring into a lead
- What Is Call Tracking? How It Measures Marketing in India — Call tracking shows which ad, listing, or page made your phone ring
- AHT Full Form: Average Handle Time and How to Improve It — AHT full form is Average Handle Time. See the formula with a worked example, what counts, how to set a fair target, India factors, and how to improve..
- Automated Calling & Answering Machine Detection — How automated outbound calling and answering machine detection work in 2026 - dialer pacing, CPS vs concurrency, and AMD across major voice APIs
- What Is Talk Time? Call Center and Recharge Meaning — Talk time is rupee balance on an Indian recharge and conversation seconds in a call center
- Call Center Optimization with AI: Metrics, Rollout, ROI — Call center optimization with AI: which metrics move, where humans stay, how to roll out safely, and a worked ROI example you can rerun with your own..
- Context-Aware Call Transfers (2026) — Call transfer in 2026: blind vs warm vs supervised, the SIP REFER/Replaces/UUI protocol layer, programmable per-leg transfer, and AI handoff
- What Is Answering Machine Detection (AMD)? (2026) — Answering Machine Detection (AMD) tells you if a human or voicemail picked up
- Intelligent Call Escalations Beyond Blind Transfers — Escalation design in 2026: triggers, skills-based routing, AI-to-human handoff with context, and conference-based supervisor controls
- Call Recording APIs for Compliant Pipelines — Call recording APIs in 2026 - dual vs mono channels, WAV/MP3, transcription pipelines, encryption & retention, and consent/PCI/GDPR-compliant design
- What Is Call Routing? Types & Examples (2026) — Call routing decides which endpoint a call reaches
- What Is a Call Leg? A-Leg vs B-Leg Explained — A call leg is one connection between the platform and one party
- IVR
- What Is an IVR (Interactive Voice Response)? — Interactive voice response explained: the three IVR levels, classic vs conversational IVR, multi-level menus, best practices, and building one with..
- What Is an IVR Number? Meaning, Types and How to Choose — An IVR number is a phone number answered by an automated menu
- What Is a Multi-Level IVR? Nested Menus & Routing — A multi-level IVR nests phone menus so callers self-route through sub-menus
- SMS and WhatsApp
- MMS Meaning: What Is MMS, How It Works and Business Use — MMS means Multimedia Messaging Service. Learn how MMS works, what an MMS video is, SMS vs MMS limits, India’s TRAI rules, and which channel to choose
- DLT Registration in India: Full Form, Process and Rules — DLT stands for Distributed Ledger Technology
- Bulk Message Sending: What Is Bulk SMS in India? — Bulk SMS sends one message to many people at once
- WhatsApp Marketing: A Practical Guide for Businesses — WhatsApp marketing explained for Indian businesses: which tool to pick, consent rules, per-message costs, Meta’s sending limits and a 30-day launch..
- 6 number code SMS: short codes vs long codes explained — What a 6 number code means in SMS, how short codes and long codes differ, how India’s DLT headers change the choice, and how to pick a sender for..
- WhatsApp Automation: What to Automate and What Not To — WhatsApp automation for Indian businesses: what to automate, what to leave to people, Meta’s latest pricing and limits, consent rules, and how to..
- Bank SMS Format: OTP and DLT SMS Templates for India — Bank SMS format samples, OTP messages and DLT-ready SMS templates for Indian businesses, with TRAI variable tags, RBI alert fields and approval..
- VoIP, SIP and voice tech
- What Is VoIP? How It Works, Types & Costs (2026) — Voice over IP explained step by step: bandwidth per codec, the parts of a VoIP network, the 5 types of VoIP, QoS for call quality, and VoIP vs..
- TTS Full Form: How Text-to-Speech Works on Phone Calls — TTS full form is text-to-speech. Learn how engines turn text into audio, why 8 kHz phone lines change the voice, Hindi challenges, and India’s A2P..
- What Is SIP Trunking? Channels, Sizing and India Rules — SIP trunking links a PBX or voice app to the PSTN over IP
- What Is a Voice API? Call Lifecycle, Webhooks and Media — A voice API lets software place, answer and control phone calls
- What Is WebRTC? How It Works & Codecs — WebRTC explained: how it works (getUserMedia, signaling, SDP, ICE/STUN/TURN, SRTP), the core APIs, codecs, WebRTC vs SIP, and WebRTC for voice AI
- What Is SIP (Session Initiation Protocol)? (2026) — SIP sets up and ends almost every internet call
- What Is Voice Transcription (ASR)? — Voice transcription (ASR) turns speech into text
- SIP vs VoIP: What’s the Difference? (2026 Guide) — VoIP is the category and SIP is its signaling protocol