Dograh Blog

AI Cold Calling for Real Estate: Rules and Scripts

AI cold calling for real estate, covering which lists are cold, the consent, do-not-call and calling-hour rules for AI-voice sales calls, Florida's tighter limits, and a short script with fixed lines and prompt guidance in Dograh.

Pritesh Kumar·Nov 7, 2026·9 min read

Answering Family Questions After Hours in Assisted Living

What an after-hours voice agent in assisted living may tell family callers, what HIPAA leaves to the on-call nurse, how the nurse handoff works, and the messages the morning team needs.

Pritesh Kumar·Nov 7, 2026·8 min read

Dealer Support Lines: Answering Product and Warranty Questions

How a manufacturer's dealer support line answers product and warranty questions with a voice agent. It covers a knowledge base from manuals and warranty terms, serial number lookups, and when a call goes to a specialist.

B2B Quote Requests by Phone: Qualify Before Sales Calls Back

How a voice agent takes B2B quote requests by phone, with the four questions that let sales quote on the first callback, what to leave for the salesperson, the CRM write and when to transfer a hot request.

Contractor Answering Service With AI: Jobs and Emergencies

How a contractor answering service with AI handles the calls you miss on a job site: a fixed gas-smell line first, estimate visits booked from your own calendar, messages written to your job system and urgent jobs sent to the on-call person.

AI After-Hours Answering Service: Messages and Emergencies

How an AI after-hours answering service turns the 9 p.m. call into tomorrow's customer: the closed-hours flow, a message the morning team can act on, urgent calls to the on-call person and what happens when the transfer goes unanswered.

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SIP Trunk Pricing in 2026: What a Line Really Costs

SIP trunk pricing explained, from per-minute and per-channel plans and US rates from Twilio, Telnyx and Plivo to the fees under the rate, one worked month of AI calls and the platform and model lines on top.

Best SIP Trunk Providers for AI Voice Agents

The best SIP trunk providers for AI voice agents, judged on audio, regions, number types, setup and transfers, covering Twilio, Telnyx, Plivo, Vonage, Exotel, Vobiz and any carrier through Managed SIP or Asterisk.

Free SIP Trunks: What Is Real and What Is a Trial

Free SIP trunks sorted into trial credit from Twilio and IDT, free trunks with paid numbers and minutes, and free inbound offers, plus what a working trunk for AI voice agents still needs before real callers reach it.

Low-Cost SIP Trunk Providers: What to Check Before You Switch

Before moving to a low-cost SIP trunk provider, check codecs and call quality, regions and support hours, number porting, emergency calling and the fees under the rate, then move the trunk without rebuilding your AI voice agent.

SIP Trunk vs PRI: Which One Works With AI Voice Agents

SIP trunk vs PRI for AI voice agents, covering what each line is, why a PRI call needs a gateway or a PBX before an AI agent can take it, how to keep a PRI with Asterisk or move to SIP, and when a PRI still fits.

Twilio vs Plivo for AI Voice Agents: Price, Numbers and Setup

Twilio vs Plivo for AI voice agents, covering who each carrier suits, every rate an AI call uses, one 5-minute call priced on both, regions and self-serve limits, and setup and transfers in Dograh.

Telnyx vs Plivo for AI Voice Agents: Coverage and Call Costs

Telnyx vs Plivo for AI voice agents, covering who each carrier suits, every rate an AI call uses, one 5-minute call priced on both, coverage and self-serve limits, number tiers, per-feature fees and setup in Dograh.

LiveKit vs Twilio for Voice Agents: Media Layer or Phone Carrier

LiveKit vs Twilio for voice agents, covering what a real-time media framework does, what a phone carrier does, why most phone agents on LiveKit still use a Twilio SIP trunk, one call priced on each stack, and where Dograh fits.

Twilio ConversationRelay Explained: What It Does and Costs

Twilio ConversationRelay explained, from how it turns a call into text for your app and every setting it gives you to what you still build, one 5-minute call priced with every model line, and the same number under a full voice agent platform.

Open-Source Alternative to Twilio Voice AI: Own the Agent Layer

An open-source alternative to Twilio voice AI that keeps your Twilio numbers, covering what Twilio's AI voice products do, what owning the agent layer changes, the same call on both routes, Docker Compose self-hosting and the Asterisk route.

Gladia Pricing in 2026: The Real-Time Rate a Voice Agent Pays

Gladia pricing for live voice agents, covering real-time and batch rates per call minute, add-ons, the 30-session cap and free credit, one worked example, Gladia next to other streaming options, and running Gladia in Dograh on your own key.

Speechmatics Pricing in 2026: What a Voice Agent Pays per Minute

Speechmatics pricing turned into cost per call minute, with every model's real-time and pre-recorded rate, the opt-in training discount, the $0.12 headline, add-ons, Linden 1 next to other speech-to-text APIs, and how Speechmatics runs in Dograh.

Deepgram Review: Is It Worth It for Voice Agents?

A Deepgram review for phone voice agents, covering Nova-3 accuracy and latency on independent tests, what phone audio changes, languages for each model, Aura-2 and Flux voices, the cost of real call volume, and running Deepgram inside Dograh.

Vemu Sandeep·Nov 7, 2026·10 min read

ElevenLabs vs Deepgram for Voice Agents: Compared Job by Job

ElevenLabs vs Deepgram for voice agents, compared job by job. Live speech-to-text on accuracy, languages and price, voices on listener scores and price, one five-minute call priced for each mix, and one agent that listens with Deepgram and speaks with ElevenLabs in Dograh.

Vemu Sandeep·Nov 7, 2026·10 min read

Cartesia vs Deepgram Aura for Phone Calls: Speed, Voice and Price

Cartesia Sonic vs Deepgram Aura-2 and Flux TTS for phone calls, covering published first-audio times, blind listening scores, 8 kHz phone audio, languages, price per call minute, and how to test both voices on your own keys in Dograh.

Deepgram vs Whisper for Voice Agents: Latency, Accuracy and Cost

Deepgram vs Whisper for live phone agents, covering streaming speed, accuracy on phone codecs, a worked break-even for one GPU against Deepgram's per-minute rate, who holds the audio, and how to test both on your own calls in Dograh.

Vemu Sandeep·Nov 7, 2026·11 min read

AssemblyAI vs Whisper for Voice Agents: Hosted API or Own GPU

AssemblyAI vs Whisper for voice agents, covering delay on a live call, accuracy on phone audio, cost at volume with the GPU break-even, who hears the call, and how to run both in Dograh.

Sierra vs Decagon: Outcome Pricing or Per-Conversation Deals

Sierra vs Decagon compared on how each charges, who builds the agent, voice calls, compliance and who each fits, with Dograh as the open-source option for teams that want their own voice stack.

Dograh vs Cresta: Contact Center AI Suite or Voice Agent Platform

Dograh vs Cresta compares a contact center AI suite that helps human agents and sells an AI agent with an open-source voice agent platform that automates the call. Where Cresta is stronger, one fair table, campaigns, QA and hosting.

Cresta Pricing in 2026: The One Public Price and What to Ask

Cresta pricing in 2026, covering how Cresta sells by contract, its one public price on AWS Marketplace and what it means per call, the questions to ask before signing, and a 5-minute AI call priced line by line on Dograh.

ElevenLabs Agents vs Vapi: Setup, Voices, Telephony and Price

ElevenLabs Agents vs Vapi compared on setup, voices, telephony, pricing and control, with one 5-minute call priced line by line on both and Dograh as the open-source option.

Retell AI vs ElevenLabs Agents: Pricing, HIPAA and Who Each Fits

Retell AI vs ElevenLabs Agents compared in one table, on one 5-minute call priced line by line, on concurrency, add-ons, HIPAA and hosting, and on who each fits, with Dograh as the open-source third option.

Synthflow Review: Pros and Cons for Enterprise Buyers

A fair Synthflow review covering how it is built and sold, what it does well, where it falls short, a pros-and-cons table beside Dograh, who it suits and where an open-source platform fits instead.

Pipecat Cloud Pricing in 2026: What a Month of Calls Costs

Pipecat Cloud pricing turned into one month of calls, covering agent minutes, reserved agents, phone lines, recording and transfers, then the same month on self-hosted Pipecat and on Dograh, which runs on Pipecat.

Goodcall Alternatives: Apps, Services and Own Agents

Goodcall alternatives for small businesses by type, covering how Goodcall bills and builds, signs you have outgrown it, receptionist apps, answering services and self-hosted agents, one month priced at 300 callers, and where Dograh fits.

Convoso AI Voice Agents Review: Who They Suit and Why

A fair review of Convoso's AI voice agents for outbound teams, covering what the Voice AI Agent does inside Convoso's dialer, where Convoso is strong, what to check on pricing, integration and consent, and running an open Dograh agent beside VICIdial.

RingCentral AI Receptionist Pricing in 2026: Add-On vs Own Agent

RingCentral AI Receptionist pricing, covering the standalone and add-on prices, the RingEX plan under it, overage in 30-second steps, one busy month priced as an example, the per-minute cost of your own agent and the same month on Dograh.

Built-In AI Receptionists in Phone Systems vs a Voice Agent

Built-in AI receptionists in business phone systems compared with a dedicated voice agent, covering what the Webex, Zoom Phone, GoTo Connect and 3CX add-ons do and cost, and how to forward calls from your phone system to your own agent.

Gemini Live API Pricing in 2026: Cost per Call Minute

Gemini Live API pricing for voice agents, covering Google's audio token rates, why every turn re-bills the whole session, a 5-minute example call priced line by line, and how to keep a long call's cost flat.

Best White-Label Voice AI Platforms for Agencies

The best white-label voice AI platforms for agencies, judged on client separation, own branding, margin per minute and model choice. The list covers Dograh, Autocalls, Trillet, Stammer, Assistable, Retell, Synthflow and Vapi, with one margin example.

Abhishek Kumar·Nov 7, 2026·6 min read

Open-Source VAD Models Compared for Phone Agents

A comparison of Silero, WebRTC VAD, TEN VAD, FireRedVAD, NVIDIA MarbleNet, pyannote and FunASR, seven open-source VAD models for voice agents, on licence terms, sample rate, size and whose benchmark says what.

LiveKit MCP Server: What It Does for Voice Agent Builders

What LiveKit's MCP server does for coding assistants, from seven tools that read LiveKit's docs, code, changelogs and Cloud pricing to its other coding-agent tools, and how Dograh's MCP server builds and edits the agent itself.

Best Open-Source IVR Software: Licenses and Setup

The best open-source IVR software compared, covering Asterisk, FreePBX and FreeSWITCH, with what each does, its license and how setup works, plus Dograh as the AI voice agent layer that connects through Asterisk ARI or a SIP trunk.

Vemu Sandeep·Nov 6, 2026·12 min read

Best AI Voice Agents for E-commerce: 8 Picks for Shopify Brands

Eight AI voice agents for Shopify brands, judged on store jobs: abandoned checkout calls, upsells and winbacks, order status and returns, and inbound support, plus Shopify events, texted checkout links, opt-outs, languages and price. Ready-made apps led by Loop Voice, then build-your-own platforms led by Dograh.

Telnyx Voice AI Pricing: What an AI Phone Call Costs

Telnyx voice AI pricing explained: the $0.05 voice engine, LLM tokens, telephony, numbers and add-ons, the three plans, and one 5-minute call priced on Telnyx's own agent and with Telnyx as the carrier under Dograh.

Cloudonix Review: The SIP Layer for AI Voice Agents

A Cloudonix review: what the SIP and call-control layer does for AI voice agents, why you still bring a carrier for numbers and minutes, every plan and overage, setting it up with Dograh, transfers, and who it suits.

White-Label Voice AI Platform: What to Look For Before You Sign

What to look for in a white-label voice AI platform: how deep the branding goes, where it runs, how clients are kept apart, model choice per client and what happens when the platform changes its terms, with one comparison table.

AI Virtual Receptionist vs Live Answering Service: How to Decide

AI virtual receptionist vs live answering service compared on cost, hours, handoff, accuracy and a busy Monday morning, with fair credit to people where judgement matters and where a mix of both fits.

AI Receptionist Pricing: What Low Monthly Plans Leave Out

AI receptionist pricing explained: billing per call, per caller and per minute, how overage grows the bill, one example month on six receptionist apps, and the same month on Dograh with every line shown.

Free AI Answering Services: What You Actually Get

Free AI answering services explained: the one standing free plan, trials and their limits, free open-source software you run yourself, and what a self-hosted receptionist still costs each month.

Best AI Phone Answering Services: Costs and Handover

Ten AI and live phone answering services grouped by type, with each one's starting price in its own billing unit and what happens when a caller asks to speak to a person.

Upfirst Alternatives: AI Answering Services Compared

Upfirst alternatives for answering-service buyers who want more control: what Upfirst does well, where its plans stop, the alternatives by type and billing unit, and where Dograh, the open-source AI voice agent platform, fits.

RingCentral AI Receptionist Review: Pros, Cons and Pricing

A fair RingCentral AI Receptionist review: what the add-on does, its plans and per-minute charges with one worked month, the pros and cons, who it suits, and how to forward RingCentral calls to an agent you run on Dograh.

Smith.ai Alternatives: AI and Human Answering Compared

Smith.ai alternatives compared: how Smith.ai sells AI and human answering, one 90-call month priced line by line, the alternatives by who answers, keeping Smith.ai behind an AI, and where Dograh, the open-source AI voice agent platform, fits.

Twilio Voice Pricing per Minute: Inbound and Outbound Calls

Twilio voice pricing per minute for AI calls: US inbound, toll-free and outbound rates, Media Streams, one 5-minute inbound and one outbound call worked line by line, rounding and call legs, and the same minutes with Dograh as the agent.

Twilio Pricing Calculator: What 1,000 AI Calls Cost

A written Twilio pricing calculator for AI voice calls: the formula with every input, 1,000 inbound and 1,000 outbound five-minute calls worked through, the inputs that move the total, and the platform and model lines added separately.

Twilio Phone Number Pricing: Local, Toll-Free and Mobile

Twilio phone number pricing for AI voice agents: US local and toll-free monthly fees, mobile numbers in the UK, how the number type changes inbound minute rates, which number fits outbound calls, and how numbers attach to an agent in Dograh.

Twilio SIP Trunking Pricing: Rates for AI Voice Calls

Twilio Elastic SIP Trunking pricing for AI voice agents: origination and termination rates, what the trunk includes, 1,000 AI calls on a trunk vs Programmable Voice, when the trunk is worth the setup, and connecting it to Dograh.

Twilio vs Telnyx for AI Voice Agents: Price and Setup

Twilio vs Telnyx for AI voice agents: a quick verdict for each, a line-by-line table, one 5-minute AI call priced on both carriers, regions, numbers and setup, and how switching carriers works under Dograh.

Gemini API Pricing in 2026: What a Voice Agent Call Costs

Gemini API pricing for voice agents: Google's list prices for each current Gemini model, one 5-minute phone call priced on each, why implicit caching misses a short phone prompt, the dated price steps and model routing to plan for, and how to switch Gemini models per agent in Dograh.

Claude API Pricing in 2026: What a Voice Agent Call Costs

Claude API pricing for voice agents: Anthropic's list prices for every current Claude model, one 5-minute phone call priced on each with the newer tokenizer counted, what prompt caching saves, which model answers fast enough for a phone turn, and how Claude runs in Dograh.

Grok API Pricing in 2026: What a Voice Agent Call Costs

Grok API pricing for voice agents: xAI's list prices for each Grok model, one 5-minute phone call priced on each, what reasoning adds to the bill and the wait, when grok-4.3 with reasoning off is enough, and how Grok runs in Dograh.

Qwen API Pricing in 2026: What a Voice Agent Call Costs

Qwen API pricing for voice agents: Alibaba Cloud Model Studio's list prices for each Qwen model, one 5-minute phone call priced on each, what context caching saves, the break-even between the hosted API and open weights on a rented GPU, and how Qwen runs in Dograh.

OpenAI Realtime API Pricing in 2026: Cost per Call Minute

OpenAI Realtime API pricing for phone agents: audio and text token prices, how many tokens a minute of speech makes, one 5-minute call worked out line by line as an example, what drives the bill up and down, and when a cascade fits better, with both run in Dograh.

Abhishek Kumar·Nov 6, 2026·6 min read

LiveKit VAD vs Pipecat VAD: Every Setting and Its Default

LiveKit VAD and Pipecat VAD settings compared from each repo: the Silero thresholds, start and silence timers, turn and interruption options, and what to change for noisy phone lines.

Abhishek Kumar·Nov 6, 2026·6 min read

WebRTC VAD vs Silero VAD: Which Works on Phone Calls

WebRTC VAD vs Silero VAD for voice agents: how each detects speech, where each fails on noisy 8 kHz phone audio, the published accuracy numbers and which one voice agent stacks ship.

Genesys Cloud AI vs Open-Source Voice Agents: Cost and Control

Genesys Cloud AI vs open-source voice agents: what Genesys includes, how seats and AI tokens add up in one worked month, where an open voice layer fits beside or instead of it, and who should stay on Genesys.

Talkdesk AI Agents Alternatives: Suites, Platforms, Open Source

Talkdesk AI Agents alternatives for teams that want their own models and data: what Talkdesk offers, the difference between BYOK and local models, other suites, hosted voice agent platforms, open-source frameworks, and where Dograh fits.

Five9 AI Agents Review: Features, Pricing and Limits

Five9 AI Agents review: an honest verdict first, then what the agents do, model choice in GenAI Studio, pricing and the 50-seat minimum, strengths, limits, who should buy, and where an open voice layer fits beside Five9.

Bland AI Review: Pros, Cons and Who It Suits

Bland AI review: the verdict first, then five tests from Bland's own docs and pricing (building agents, models and voices, phone lines and transfers, limits at volume, compliance) and where self-hosted open source fits instead.

Vapi Review: Pros, Cons and Who Should Use It

Vapi review with the verdict first: three things Vapi does well (model choice, Squads with GitOps and Evals, phone numbers), three ways it limits teams, the open-source answer to each, and who should pick Vapi.

Deepgram vs AssemblyAI: Speech-to-Text for Voice Agents

Deepgram vs AssemblyAI for live voice agents: four tests (streaming and turn detection, price per minute, languages, accuracy on phone audio), a pick-this-if verdict for each, and how to run both on your own calls.

AssemblyAI Pricing: Cost per Call Minute for Voice Agents

AssemblyAI pricing turned into cost per call minute: streaming and batch rates, add-ons that bill for the whole session, how idle time counts, free credit and limits, and how AssemblyAI runs inside an open-source voice agent.

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Pritesh Kumar·Nov 6, 2026·11 min read

How to Start an AI Voice Agent Agency: Stack, Pricing and Clients

How to start an AI voice agent agency: what you sell, the stack under every client, one client's monthly bill worked line by line, how to charge setup and monthly fees, keeping clients apart, your brand on the call and what to do when a platform changes its terms.

Pritesh Kumar·Nov 6, 2026·11 min read

Twilio Pricing in 2026: Every Line Item of an AI Voice Call

Twilio pricing for AI voice agents, line by line: the phone number, inbound and outbound minutes, Media Streams vs ConversationRelay, recording and add-ons, one worked 5-minute call, the SIP trunk option and Twilio as the carrier under Dograh.

Pritesh Kumar·Nov 6, 2026·12 min read

LLM API Pricing in 2026: What a Voice Agent Call Costs

LLM API pricing for voice agents, worked through one 5-minute phone call: the prompt re-sent every turn, the token count line by line, the call priced on Claude, Gemini, Grok, Qwen and OpenAI models, when caching applies, and how the LLM line compares with speech-to-text and voice.

Abhishek Kumar·Nov 6, 2026·11 min read

Voice Activity Detection Explained: VAD for Voice Agents

Voice activity detection explained for voice agents: how VAD scores call audio, why it is not end-of-turn detection, the four ways phone lines trip it up, and the setting that fixes each symptom.

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Wholesale and Reseller SIP Trunks for Voice AI Agencies

How voice AI agencies buy SIP trunk minutes in bulk, split them per client with carrier subaccounts or managed accounts, route each client's numbers to its own agent and re-bill each client for its share.

ElevenLabs Scribe Speech-to-Text for Voice Agents on Phone Calls

ElevenLabs Scribe for voice agents, covering the batch and realtime models, how Scribe v2 Realtime handles 8 kHz phone audio, its latency, accuracy, languages and price, how it compares with Deepgram, and how it runs in Dograh.

Open-Source Predictive Dialer With an AI Agent: The Handoff

How an open-source predictive dialer and an AI voice agent split the work, with VICIdial pacing the calls and Dograh taking the answered ones over Asterisk ARI and writing outcomes and do-not-call requests back, plus the two-second abandoned-call rule.

EU AI Act High-Risk Rules for Voice Agents in 2026

Which voice-agent uses fall on the EU AI Act's high-risk list, from credit and insurance calls to hiring screens and emergency lines, which usually do not, the narrow way out and what deployers must do from 2 December 2027.

Pritesh Kumar·Nov 7, 2026·6 min read

EU AI Act Risk Categories Explained for Voice AI in 2026

The EU AI Act's four risk levels for voice AI are banned, high-risk, transparency and minimal risk. Each gets a phone-agent example, plus the call-centre emotion rule and the AI notice every voice agent needs.

Abhishek Kumar·Nov 7, 2026·7 min read

Securing Tool Calls and Webhooks in Voice Agents: What to Check

How to secure the HTTP requests a voice agent makes mid-call and the webhook it sends after, with a stored credential on every request, one narrow job per endpoint, a timeout that fails closed, safe webhook receivers and the log line to keep.

Abhishek Kumar·Nov 7, 2026·9 min read

Running Voice AI on Your Own GPUs: Sizing, Serving and the Monthly Bill

How to run a voice agent's models on your own GPUs, covering memory per model, serving the language model with vLLM and speech with Speaches, how many calls a card carries, and what an always-on GPU costs each month.

Abhishek Kumar·Nov 7, 2026·7 min read

Pipecat Flows Explained: Nodes, Functions and a Working Example

How Pipecat Flows splits a voice agent call into nodes and functions, with a small YAML and Python example, the cascade-only limit, and how a visual workflow builder such as Dograh's maps to the same idea.

White-Label AI Receptionist for Agencies: Numbers, Data and Price

A white-label AI receptionist for agencies: what callers hear and what the client sees, running it under your own brand or one Dograh Cloud team per client, who holds the numbers and call data, and how to price it.

Abhishek Kumar·Nov 6, 2026·6 min read

Managing Multiple Clients on One Voice AI Platform

Managing multiple clients on one voice AI platform: one organization per client or one for all, and how to keep each client's numbers, prompts, knowledge files, model keys, reports and billing apart on Dograh Cloud or self-hosted.

Abhishek Kumar·Nov 6, 2026·7 min read

Voice AI Agency Tech Stack: Telephony, Models and Platform

The voice AI agency tech stack layer by layer: carriers and SIP trunks, speech-to-text, the language model, the voice and the platform, with model costs per minute kept apart from the platform and one example stack per budget.

Pritesh Kumar·Nov 6, 2026·7 min read

AI Answering Service for Business: How a Voice Agent Takes Calls

How an AI answering service for business handles one call: the greeting, answers from your documents, booking through your scheduling system, the transfer to a person, and the branch where nobody picks up.

Pritesh Kumar·Nov 6, 2026·7 min read

HIPAA-Compliant AI Receptionist for Medical Offices

Which companies behind an AI receptionist need a business associate agreement with a medical office, how booking and messages can stay on the practice's own systems, and how to set up a self-hosted receptionist.

Pritesh Kumar·Nov 6, 2026·6 min read

EU AI Act Article 50: What a Voice Agent Must Tell Callers

Article 50 of the EU AI Act in plain words for phone agents: tell callers they are talking to an AI at the start of the call, what the Commission's guidelines ask on the phone, when the obvious exception fails, four sample opening lines and how to make the notice play in full.

Pritesh Kumar·Nov 6, 2026·6 min read

EU AI Act Timeline: What Applies From August 2026

Every EU AI Act application date in one table, from the 2025 bans to the 2030 public-authority deadline, what the AI Omnibus moved, and what the 2 August 2026 AI notice means for a phone agent.

Pritesh Kumar·Nov 6, 2026·8 min read

Can AI Voice Agents Make Outbound Calls? Yes, With Consent First

Yes, AI voice agents can make outbound calls. What it takes: consent before the first dial, a campaign from a CSV list or a single call started from your own system, an opening that names the business, and where outbound calls break.

AI Cold Calling Bots: How They Work and Where They Fail

How an AI cold calling bot handles each phase of a call, from the greeting and the person-or-machine check to voicemail, call screeners, objections, opt-outs and the handover to a rep, where each phase breaks, and the consent rules that apply before any call.

Abhishek Kumar·Nov 6, 2026·9 min read

STIR/SHAKEN and Caller ID: Why AI Calls Get Marked as Spam

Why AI calls get labelled Spam Likely: what STIR/SHAKEN attestation levels A, B and C mean, why platform calls with outside numbers get B, why signed calls still get labelled, the Free Caller Registry, branded caller ID, how Dograh picks caller IDs and how to recover a flagged number.

Abhishek Kumar·Nov 6, 2026·7 min read

API Key Safety for Voice AI: BYOK, Rotation and Service Keys

API key safety for voice AI: where model, telephony and Dograh keys live in a self-hosted stack, how to rotate each kind without dropping calls, how service keys work, and what to do after a leak.

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Twilio Elastic SIP Trunking for AI Voice Agents: Setup Guide

How to set up Twilio Elastic SIP Trunking for an AI voice agent. Create the trunk, point Origination at Dograh, allow Dograh's IP on Termination, move your numbers, route them to the agent and test, plus what a production trunk still needs.

Speech-to-Text API in Python: Streaming a Phone Call

Stream a phone call to a speech-to-text API in Python, sending 8 kHz mu-law audio over a WebSocket with the settings that matter for phone audio, partial transcripts, a recorded call paced as live, then a Twilio Media Stream.

Abhishek Kumar·Nov 7, 2026·7 min read

Cold Calling Practice With AI: Build a Roleplay Caller

Build an AI practice prospect for cold calling from a persona prompt with real objections and a fixed pickup line, call it from the browser and a phone, grade the rep with a QA rubric, and review each recording and transcript.

Abhishek Kumar·Nov 7, 2026·6 min read

Voice Activity Detection in Python: A Working Example

Voice activity detection in Python with Silero VAD on a real 8 kHz phone call. Install it, find speech segments, change one setting at a time, then stream it in 32 ms chunks the way a live voice agent does.

Outbound Voice Campaigns: The Complete Pre-Launch Guide

Everything a team sets before its first outbound voice campaign, step by step: the consented list, calling hours in one time zone, pace, retries from 0 to 10, voicemail, a traffic split for testing scripts and the circuit breaker that stops a failing campaign.

Abhishek Kumar·Nov 6, 2026·10 min read

How to Migrate From ElevenLabs Agents to Open-Source Voice AI

How to migrate from ElevenLabs Agents to open-source voice AI without losing the voice: export the agent, move the voice on your own key, rebuild the prompt and flow, map each tool, move the knowledge base and switch numbers one at a time.