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Every page in the Documentation section of the Vobiz documentation (99 pages), grouped as it appears in the sidebar, with a one line summary of each. The other sections are listed on the documentation sitemap.

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Getting Started

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Core Concepts

  • Vobiz Platform Concepts & Architecture — Master core Vobiz telephony concepts - SIP signaling, RTP media, WebSocket streaming, callbacks, and when to choose SIP vs WebSockets for AI voice..
  • SIP Trunking — SIP is the signaling standard behind nearly every modern phone call
  • Bring Your Own Carrier (BYOC) — Connect your existing carrier, SBC, or PBX to Vobiz - what details to send, which Vobiz IP ranges to whitelist, and how provisioning runs end to end
  • Voice streaming over WebSockets — Understand how Vobiz sends inbound call audio to your WebSocket application and receives independent outbound playback audio
  • SIP vs WebSockets — Compare SIP and WebSocket architectures for connecting phone calls to AI voice agents - pick the right fit for latency, cost, and deployment speed
  • Vobiz sub-accounts vs partner accounts — Choose between Vobiz sub-accounts and partner child accounts for a multi-customer platform - how balance, KYC, numbers, CPS, and concurrency behave..
  • Vobiz Webhooks (Callbacks): Real-Time Call Events — Vobiz webhooks (callbacks) are HTTP POST requests sent to your server when call, recording, conference, and message events occur, for real-time..
  • Vobiz Webhook (Callback) Configuration — Configure Vobiz webhook (callback) URLs across resources to receive real-time event notifications for calls, conferences, recordings, and more
  • Validating Callbacks — Verify that every callback your server receives genuinely came from Vobiz by checking the HMAC signatures sent in each request
  • IP Address Whitelisting — Whitelist these IP addresses on your firewall for uninterrupted SIP signaling, RTP media, WebSocket streaming, and callback delivery with Vobiz
  • Voice API Hangup Causes – Codes & Troubleshooting — Reference every Vobiz hangup code, cause, and source - decode why a call disconnected from the CDR or hangup callback, and follow the next step to..

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Best Practices

  • Integration Best Practices: Security & Reliability — Build secure, reliable Vobiz integrations with guidance on credential management, webhook hardening, rate limiting, and global compliance patterns
  • How an Outbound Campaign Manager Works (2026 Guide) — A vendor-neutral guide to outbound campaign managers - dial lifecycle, number rotation, daily caps, retry policy - and how Vobiz Campaigns implements..
  • Number Utilization Guide — Maximize call connectivity, reduce spam flagging, and maintain TRAI compliance with these Vobiz number utilization best practices for Indian..
  • Number Health Guide — Keep caller-ID (DID) numbers healthy for high-volume outbound voice - answer rate, pacing and CPS, repeat-dial limits, warm-up schedule, and..
  • DLT Entity Registration Guide — DLT registration on Vobiz, step by step - Principal Entity, header, content template, and consent template approval for India voice and messaging
  • 140 & 160 Series Number Acquisition Guide — Acquire TRAI-regulated 140 and 160 series numbers on Vobiz - covers eligibility, required documents, use-case scenarios, and 2025 compliance..
  • DID Provisioning Process for 140 & 160 Series — Provision 140 and 160 series DID numbers on Vobiz - PE certificate, LOI, TM ID header registration, NOC-based DLT registration, lock-in, and..
  • 92 Series Number Guide — Acquire and manage 92-series mobile-format numbers on Vobiz for India - higher consumer pickup rates, per-number Aadhaar KYC, and the 5-per-person..

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Using Vobiz Platform

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Messaging (SMS & RCS)

  • Vobiz Messaging Numbers — List, search, buy, register, and release SMS and MMS numbers on Vobiz - number fields, available countries, purchase billing, and bringing your own..
  • Vobiz Messaging Compliance: 10DLC, Toll-Free & DLT — Choose the messaging registration path for each Vobiz number type (US 10DLC, US toll-free, India DLT), prepare to submit, track review, and fix..
  • US 10DLC brands — Register your business as a 10DLC brand through the Vobiz Messaging API - create, submit, poll statuses, verify public companies, and request vetting
  • US 10DLC campaigns — Create and register a 10DLC campaign through the Vobiz Messaging API - describe the use case, submit for carrier review, poll statuses, and attach..
  • US toll-free verification — Verify a US toll-free (8XX) messaging number through the Vobiz Messaging API - submit business details, attach the number, poll the review, and..
  • India DLT — Send SMS to Indian numbers through Vobiz with TRAI DLT identifiers - pass dltEntityId, dltHeaderId, and dltTemplateId, and match the registered..

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Compliance (India)

  • India Calling Regulations — Regulatory requirements, eligibility rules, and compliance setup for domestic voice calling within India on Vobiz - DLT, KYC, and TRAI guidelines
  • India Number KYC — Verify your identity or business to start renting Indian phone numbers
  • UCC & NDNC Compliance — NDNC/DND registry, UCC complaints, and TRAI enforcement for Indian voice numbers - how Vobiz enforces Do Not Call and what to do about a complaint

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FAQ

  • Vobiz FAQ: Billing, API Limits & SIP Trunking — Quick answers on Vobiz accounts, billing, concurrency limits, SIP trunking, AI voice integrations, and global compliance, with a full answer for each..
  • Can I connect my trial number for inbound calls? — Vobiz trial numbers are outbound-only - understand why inbound routing is restricted on trial accounts and the exact steps to unlock it on a verified..
  • SIP 480 & 486 Errors: Temporarily Unavailable & Busy Here — SIP 480 Temporarily Unavailable and SIP 486 Busy Here explained: what triggers each, how to diagnose them, and how to handle them in your Vobiz..
  • Why am I receiving a 429 error? — A Vobiz 429 Too Many Requests error means you have hit a concurrency or CPS limit - find out which limit is breached and the exact steps to fix it
  • ‘From number not owned by account’ Error — Fix the Vobiz Make Call error for a from number your account does not own: a caller ID that is someone else’s, or a number bought under two minutes..
  • What is Concurrency? — Concurrency on Vobiz is how many calls run at once on your account - understand channel limits, what triggers a 429 error, and how to size for your..
  • What is CPS (Calls Per Second)? — CPS on Vobiz controls how fast you can initiate calls, independent of concurrency - learn how rate limiting works and how to pace dialers to avoid..
  • Can I purchase additional Concurrency or CPS? — Upgrade your Vobiz concurrency and CPS limits through the dashboard to scale outbound campaigns and handle more simultaneous calls, step by step
  • Do you provide 140, 160, and 92 series numbers? — Vobiz provisions 140, 160, and 92-series numbers for India - learn the TRAI-regulated use case for each series, pickup rate advantages, and how to..
  • What integrations do you support? — Vobiz natively supports LiveKit, Pipecat, Retell AI, ElevenLabs, VAPI, and SIP PBX systems - connect any AI voice agent or WebRTC stack to telephony
  • Is call transfer supported? — Vobiz supports three call transfer methods - VobizXML Dial, REST API live transfer, and SIP REFER (RFC 3515) - for warm, cold, and AI agent transfers
  • Do you support IVR? — Build programmable IVR menus on Vobiz using Gather, Speak, Play, and SIP transfer in VobizXML - with DTMF input, speech recognition, and dynamic..
  • What documents are required for verification? — Complete Vobiz KYC verification with GST certificate for organizations or Aadhaar and PAN for individuals - required before purchasing live numbers..
  • How can I contact support? — Contact the Vobiz engineering and success teams by email for API integration help, network debugging, capacity upgrades, and billing, with tips to..
  • Domestic Calling in India — Use Vobiz domestic calling for IN-to-IN traffic to get lower latency, local caller ID, INR billing, and better audio quality than international..

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Tools

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AI agents

  • Vobiz Agent Skills — Install the Vobiz agent skills into Claude Code, Codex, and 40+ other coding agents with one command, so your assistant knows the API and VobizXML
  • Vobiz MCP Server — Let Claude, Cursor, VS Code, and other AI clients work on your Vobiz account through MCP: place calls, manage numbers, send SMS, confirming each..
  • Vobiz Docs MCP Server — Connect Claude, Cursor, VS Code, and other AI clients to the Vobiz documentation through the Model Context Protocol (MCP), with npx and native config..
  • Vobiz CLI — Install the Vobiz CLI to place calls, send SMS, manage numbers and SIP trunks, export call records, and build VobizXML from your terminal, scripts..