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BYOC Voice AI Integration in India: Connect Your SIP Trunk

Bolti Team·

Bringing your own carrier (BYOC) lets you hook your existing telecom infrastructure directly into an automated voice agent. For Indian enterprises handling high call volumes, a byoc voice ai integration india is the most effective way to lower overall telephony spend while maintaining full control over your phone numbers and carrier relationships.

Bolti is a voice AI platform for building production-ready conversational phone agents. With Bolti's free 50-minute trial, you can test these integrations instantly. If you already have dedicated SIP trunks with Indian telecom operators like Tata Tele Business Services, Airtel, Jio, or cloud telephony providers like Exotel, Plivo, and Twilio, you do not need to buy new numbers. You can route those existing lines directly into Bolti's low-latency voice AI pipeline.

Why choose BYOC voice AI integration in India?

Choosing a BYOC model instead of relying on pre-packaged, bundled telecom numbers offers three distinct advantages for Indian businesses:

  • Significant Cost Savings: Bundled voice AI minutes often hide marked-up telecom rates. By bringing your own SIP trunk, you pay your carrier your pre-negotiated volume rates (often as low as 15 to 30 paise per minute in India) and pay Bolti only for the AI orchestration layer starting at ₹7/min on a pay-as-you-go basis. You can view our transparent pricing to see how this fits your budget.
  • Number Retention and Brand Identity: Your customers already recognize your existing outbound Caller IDs. BYOC ensures you do not have to discard established support and sales numbers that have high trust ratings on spam-filtering apps like Truecaller.
  • Regulatory and Compliance Control: Under India's Digital Personal Data Protection (DPDP) Act, controlling where call traffic routes is critical. BYOC allows you to keep your voice traffic within your trusted telecom partner's private network before it reaches Bolti's E2E Networks infrastructure hosted locally in India.

How does the BYOC voice AI architecture work?

When a customer dials your number or your system triggers an outbound call, the media stream flows through a structured, multi-provider pipeline. 

Caller's Phone ──[Your SIP Trunk / Carrier]──> Bolti Realtime Audio Service (India)
                                                        │
                                          ┌─────────────┴─────────────┐
                                          ▼ [STT]                     ▼ [TTS]
                                    Transcribes Audio           Synthesizes Voice
                                    (e.g., Fennec, Sarvam)     (e.g., Sarvam, Cartesia)
                                          │                           ▲
                                          └───────────> [LLM] ────────┘
                                                    Decides Reply
                                                (e.g., Llama on Groq)
  1. The Telephony Layer: Your carrier (e.g., Exotel, Twilio, or an on-premise SIP gateway) routes the call via SIP trunking to Bolti's media servers.
  2. Speech-to-Text (STT): Bolti processes the incoming audio stream. For Indian accents and multilingual environments (Hindi, Marathi, Tamil, Telugu, etc.), Bolti routes the audio to localized engines like Fennec or SarvamAI to transcribe speech to text with sub-second latency.
  3. Large Language Model (LLM): The transcribed text is sent to the LLM (like Groq's Llama models or GPT-4o) to determine the next response or execute tools.
  4. Text-to-Speech (TTS): The response is converted back to natural-sounding audio using localized voice cards (such as Anushka via SarvamAI or Irisha via SmallestAI) and streamed back through your SIP trunk to the caller.

Step-by-step: Connecting your SIP trunk to Bolti

Setting up a BYOC voice AI integration in India is straightforward. You do not need to write complex SIP routing rules from scratch. Follow these steps to link your carrier to Bolti:

  1. Configure Your SIP Trunk on Your Carrier Portal: Log into your telecom provider (such as Twilio, Plivo, or Exotel). Set up a termination SIP URI pointing to Bolti's Indian gateway IP addresses.
  2. Add Your Credentials in Bolti: In the Bolti dashboard, navigate to your Telephony settings. Choose the "Bring Your Own Carrier" option and enter your SIP trunk details, including the authentication credentials and the IP addresses of your carrier.
  3. Assign Your Numbers to an Agent: Once your SIP trunk is verified, your active phone numbers will appear in your Bolti dashboard. Assign each number to a specific conversational AI agent.
  4. Select Your Multilingual Voice and STT Stack: Go to your agent's Voice and Speech tabs. If your audience speaks regional Indian languages, select Fennec for STT and SarvamAI's "Anushka" voice card for TTS to ensure natural, low-latency conversations.
  5. Test the Connection: Make a test call to your configured number. Verify that the call connects, the latency remains under 800ms, and the agent responds naturally without audio drops.

Optimizing latency and data residency in India

For voice AI to feel like a natural human conversation, latency must remain under 800ms. When using a BYOC setup in India, routing your media through local servers is essential.

Bolti's managed cloud runs on E2E Networks infrastructure in India by default. This means your application data, call recordings, and call transcripts live within the ap-south geographical region. By keeping your SIP trunk termination points inside India and pairing them with Bolti's local infrastructure, you avoid the latency penalty of routing call audio to North American or European servers and back.

Additionally, you can use Bolti's webhook infrastructure to sync call records instantly back to your domestic CRM. Every time a call ends, Bolti triggers a conversation.completed event via an HTTPS POST payload, allowing you to reconcile call billing and update lead statuses automatically without polling the API.

Try Bolti for your business in India

Setting up a BYOC voice AI integration in India does not require weeks of custom development. You can connect your existing SIP trunk and deploy a localized, multilingual voice agent in minutes.

Sign up for a free trial today to get 50 free minutes of call time, or explore our flexible ₹7/min pay-as-you-go pricing to scale your outbound sales, customer support, or automated reminders.

Frequently Asked Questions

Which Indian telecom carriers can I use with Bolti's BYOC?

You can connect virtually any carrier that supports SIP trunking, including major Indian operators like Tata Tele Business Services, Airtel, and Reliance Jio, as well as cloud communication platforms like Exotel, Plivo, and Twilio.

Does using BYOC reduce the cost of voice AI calls?

Yes. With BYOC, you pay your telecom carrier directly for call transit at your negotiated volume rates (often a few paise per minute in India). You only pay Bolti for the AI orchestration layer, which starts at ₹7/min pay-as-you-go, rather than paying marked-up bundled call rates.

Is customer call data kept within India during BYOC calls?

Yes. Bolti's managed cloud runs on local E2E Networks infrastructure in India. Your call recordings, transcripts, and application data are stored within the country, helping you comply with domestic data protection regulations like the DPDP Act.

Can my BYOC agent handle Indian regional languages?

Yes. Bolti supports over 80 languages. For Indian regional languages, you can pair your SIP trunk with localized STT engines like Fennec and specialized Indic TTS providers like SarvamAI (featuring voices like Anushka) to handle Hindi, Tamil, Telugu, Marathi, and more.