Complete Guide to DLT Registration in India
Everything you need to know about TRAI's DLT platform for bulk SMS
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High-throughput messaging, intelligent voice systems, and API-first integration โ engineered for mission-critical delivery at scale.
Duotech powers our mission-critical messaging infrastructure. Their WhatsApp API integration handles over 2 million conversations monthly with zero downtime.
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Fully compliant messaging infrastructure registered and certified to meet all Indian telecom regulations.
Developer-friendly REST APIs with comprehensive SDKs for rapid integration into any stack.
We maintain mission-critical messaging infrastructure under zero-downtime mandates. Our architecture scales with your data footprint across every channel.
Automated failovers across isolated zones keep your campaigns active 24/7.
High-throughput delivery across SMS, WhatsApp, and voice channels globally.
Powering communication for banks, fintechs, e-commerce, and healthcare.
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Contact SalesHigh-throughput delivery systems capable of processing millions of requests with sub-second latency and global reach.
Seamless API integration for conversational commerce, automated support, and high-fidelity customer engagement.
Intelligent voice response systems featuring natural language processing and dynamic routing for elite caller experiences.
Automated outbound voice campaigns with intelligent routing, real-time analytics, and high-delivery infrastructure.
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Custom relationship management tools designed to synthesize data into actionable insights and operational efficiency.
Tailored communication infrastructure for every sector โ from healthcare compliance to e-commerce scale.
Secure HIPAA-compliant messaging for hospitals & clinics
Transactional SMS, OTP services, secure alerts
WhatsApp API for order updates, cart recovery
Bulk SMS for schools, colleges, exam alerts
IVR systems for property inquiries, voice OBD campaigns
Real-time tracking alerts, delivery confirmations
Booking confirmations, voice notifications
Promotional SMS, WhatsApp marketing campaigns
CRM for orders, WhatsApp for reservations
RCS messaging for rich learning content
Enterprise-grade REST APIs, real-time webhooks, and pre-built integrations designed for seamless engineering workflows.
Clean JSON endpoints for SMS, WhatsApp, and Voice โ built on predictable, resource-oriented URLs.
Real-time delivery reports, read receipts, and status updates pushed directly to your endpoint.
Official client libraries for PHP, Python, Node.js, Java, and cURL โ ship faster with less boilerplate.
Detailed API reference with copy-paste code examples, sandbox environment, and Postman collections.
Native connectors for Salesforce, HubSpot, Zoho, and custom CRM pipelines.
Transactional alerts, order confirmations, and abandoned cart recovery via messaging.
Purpose-built middleware and webhook orchestration for enterprise-grade workflows.
Comprehensive access across messaging, voice, analytics, billing, and account management.
Custom websites and web apps built with modern frameworks. Fast, secure, and optimized for search engines.
Native Android applications that run smoothly on all devices. Built with the latest tools and best practices.
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Four stages to transform your communication infrastructure โ from audit to live deployment with full enterprise support.
We analyze your current messaging and voice infrastructure, identifying bottlenecks and mapping your requirements to the right technology stack.
Learn MoreArchitects design your custom communication framework โ selecting the optimal mix of Bulk SMS, WhatsApp API, IVR, and Voice OBD channels.
Bulk SMSOur engineering team integrates APIs, configures routing logic, and deploys your solution into a staging environment for rigorous validation.
WhatsApp APIProduction deployment with real-time monitoring, automated failover, and 24/7 support to ensure 99.9% uptime from day one.
IVR & VoicePAN India presence with international SMS routes to 190+ countries. Direct operator connections ensure maximum delivery rates.
Full PAN India coverage with direct connections to all major telecom operators. Local routing for highest delivery rates.
Established routes across the UAE and broader Middle East region. Dedicated corridors for enterprise-grade delivery.
Expanding footprint across Southeast Asian markets. Reliable messaging routes to Singapore, Malaysia, and Indonesia.
International SMS routes spanning 190+ countries. Single API integration for worldwide messaging reach.
Insights on Bulk SMS, WhatsApp API, Cloud Telephony & more
Everything you need to know about TRAI's DLT platform for bulk SMS
Read MoreLearn how bulk SMS works, DLT requirements, and how to get started
Read MoreUnderstand SMS pricing factors, volume discounts, and hidden costs
Read MoreHigh-precision tools engineered for mission-critical business excellence.
A unified relationship management platform. Orchestrate lead acquisition, pipeline intelligence, and behavioral analytics in a single, immersive interface.
Explore CRMAutomated outbound dialing with intelligent routing, real-time campaign analytics, and carrier-grade delivery infrastructure.
View OBDIntelligent voice response with NLP routing, automated call flows, and deep analytics for enterprise-grade telephony operations.
Explore IVREverything you need to know about Bulk SMS, WhatsApp API, IVR, Voice OBD, DLT registration, and our platform.
Bulk SMS is a service that allows businesses to send large volumes of text messages to multiple recipients simultaneously. It is commonly used for promotional campaigns, transactional alerts, OTP verification, and customer notifications.
Yes, as per TRAI regulations, DLT (Distributed Ledger Technology) registration is mandatory for all businesses sending Bulk SMS in India. You must register your business, SMS headers, and content templates on the DLT platform before sending messages.
PE ID stands for Principal Entity ID. It is a unique 15-digit registration number assigned to your business on the DLT platform after successful registration. You need this ID to register SMS headers and templates.
The WhatsApp Business API enables businesses to send and receive WhatsApp messages programmatically. It supports automated notifications, customer support conversations, and marketing campaigns with rich media. Unlike the WhatsApp Business App, the API allows integration with your CRM and automation tools.
Cloud IVR (Interactive Voice Response) is a telephony system hosted on the cloud that automates incoming call handling. It uses voice menus and keypad inputs to direct callers to the right department without human intervention.
Transactional SMS are triggered by user actions (e.g., OTP, order confirmation, bank alerts) and can be sent 24x7. Promotional SMS are marketing messages restricted to 9 AM to 9 PM by TRAI regulations. Transactional messages have higher delivery priority.
DLT template approval typically takes 2-3 business days for standard templates. Complex templates or those with URL shorteners may take longer. We assist with template creation to ensure faster approval.
Yes, we provide a RESTful SMS API with support for multiple programming languages including PHP, Python, Node.js, Java, and cURL. The API supports bulk sending, OTP generation, delivery reports, and webhook callbacks.
Yes, our platform offers native integrations with popular CRMs like Salesforce, HubSpot, and Microsoft Dynamics. We also provide custom webhooks and REST APIs for bespoke integrations.
OTP SMS can be sent using our Transactional SMS API. You can generate a random OTP on your server and send it through our API endpoints. We support features like resend OTP, expiry timers, and delivery confirmation.
RCS (Rich Communication Services) is the evolution of SMS that supports rich media, interactive buttons, read receipts, and typing indicators. Unlike plain SMS, RCS messages look like chat apps and offer higher engagement rates.
Voice OBD (Outbound Dialing) allows automated voice calls to large customer lists. Benefits include personalized voice messages, real-time delivery tracking, interactive call flows, and integration with CRM data.
Yes, we are fully compliant with TRAI regulations for Bulk SMS, including DLT registration, header and template registration, and DND compliance. Our platform automatically filters DND registered numbers for promotional campaigns.
Yes, our dashboard allows you to schedule SMS campaigns for future dates and times. You can also set recurring schedules for periodic messages like daily alerts or weekly newsletters.
A single SMS has a 160-character limit for standard GSM encoding. Messages exceeding 160 characters are automatically split into multiple segments. Unicode messages (e.g., Hindi, Arabic) have a 70-character limit per SMS.
We use end-to-end encryption for all API calls, multi-factor authentication for dashboard access, SOC 2 Type II certified infrastructure, and adhere to GDPR, HIPAA, and local data residency laws.
We guarantee 99.9% uptime for our messaging and voice services, backed by our SLA. Our infrastructure uses redundant servers, failover systems, and real-time monitoring to ensure continuous availability.
Yes, every message sent through our platform generates a detailed delivery report including delivered, failed, pending, and undelivered status. Reports are available in the dashboard and can be fetched via API or webhook callbacks.
Yes, we support international SMS delivery to 190+ countries through direct operator connections. Our platform automatically routes messages based on the destination country for optimal delivery.
The WhatsApp Business App is a free mobile app for small businesses with limited automation. The WhatsApp Business API is designed for medium to large enterprises and supports programmatic messaging, multi-agent systems, CRM integration, and high-volume throughput.
Yes, we provide toll-free number services with IVR integration. You can set up a toll-free number for customer support with IVR menus, call routing, and call recording capabilities.
We support 6-character custom sender IDs for promotional SMS (e.g., BRANDX), numeric sender IDs for transactional/OTP SMS (e.g., 123456), and alphanumeric sender IDs for service SMS. All sender IDs must be registered on the DLT platform.
Getting started is simple: contact our sales team, complete the onboarding and DLT registration process, integrate our API or use our dashboard, and start sending messages. Most clients go live within 2-3 business days.
Connect with our team to deploy high-volume messaging, voice, and API infrastructure tailored to your enterprise needs.