A vendor hands you a login.
We deploy a running sovereign system.
Paisan is engineered for mission-critical voice operations. From direct telecom SIP trunking with Airtel, Tata, and Jio, to sub-300ms Indic speech-to-speech inference, dedicated private VPCs, air-gapped on-premise appliances, and DPDP-compliant data vaults.
End-to-end telemetry from carrier SIP to CRM disposition.
Every call flows through our hardened high-throughput pipeline. No external third-party API hops, no offshore data transit, and zero unencrypted voice payloads.
Telecom Ingestion
Direct SIP interconnect with Tata, Airtel, Jio, and Exotel. Dynamic CLI rotation and DLT registration headers.
Edge Pre-processing
Indian ambient noise suppression (traffic, ceiling fans). Sub-15ms VAD with instant human barge-in interruption.
Indic Speech Engine
Real-time speech-to-speech Indic models. Native Hinglish code-mixing, emotion conditioning, and 90ms neural TTS synthesis.
Mid-Call Execution
Parallel API lookups for live EMI balances, lead records, and CRM updates in <120ms without stalling vocal cadence.
Dispositions & Sync
PII-redacted audio recording vault, automated structured summaries, sentiment analysis, and bi-directional CRM syncing.
The 9-Layer Architecture of Paisan Voice AI
Every layer has been constructed from the ground up for Indian enterprise operations: dealing with noisy telephony channels, dialect variance, regulatory call windows, and uncompromising data isolation.
Carrier Ingestion & SIP Trunking
Native carrier interconnects with Tata Tele Business Services (TTBS), Bharti Airtel, Reliance Jio, Exotel, and Twilio. Connects via dedicated PRI lines or encrypted SIP trunks.
- › Geo-redundant SBCs in Mumbai and Hyderabad
- › Dynamic CLI rotation & CNAP compliance
- › TRAI DLT registration and verified caller ID
Acoustic Pre-Processing & VAD
Dual-channel 16kHz audio stream ingestion. Proprietary noise suppression filters out Indian ambient sounds—traffic horns, ceiling fan buzz, and bustling call-center chatter.
- › Sub-15ms ultra-low latency Voice Activity Detection
- › Instant human barge-in cut-through (<80ms)
- › Opus, G.711u, G.711a, and PCM 16kHz codecs
Conversational Indic Speech Recognition
Trained on over 20,000 hours of natural Indian telephony conversations. Handles rapid code-mixing (Hinglish, Tanglish, Marathish) and local phonetic variations.
- › 30+ regional languages and dialects supported
- › Real-time word-level partial streaming output
- › Phonetic accuracy for Indian names & pin codes
State Machine & Guardrails
High-speed deterministic dialogue state engine that enforces strict business flows (EMI reminders, KYC verifications, slot bookings) without hallucinating facts.
- › Real-time slot filling & entity extraction
- › Financial calculation guardrails (interest/penalties)
- › State persistence across hold and transfer events
Speech-to-Speech Indic LLM Tier
Quantized high-throughput reasoning models hosted on dedicated NVIDIA H100 GPU clusters in Indian sovereign data centers. Zero cross-border token transit.
- › Sub-180ms Time-to-First-Token (TTFT)
- › Emotion conditioning (empathetic, firm, polite)
- › Domain-grounded vector knowledge integration
Streaming Expressive Neural Voice Synthesis
Generates audio chunks in <90ms with natural breathing pauses, authentic colloquial fillers ("haan ji", "theek hai", "bilkul"), and culturally resonant inflections.
- › 40+ natural voices across gender and regional accents
- › Dynamic pitch adaptation aligned to dialogue mood
- › Ultra-smooth chunk stitching over RTP streams
Mid-Call Tools & Human Escalation
Execute backend actions during live calls without pausing the agent's speech. Fetch account balances or schedule visits in <120ms with seamless human handoff.
- › SIP REFER warm and cold call transfers
- › Real-time screen-pop with transcript & sentiment
- › Dual-tone multi-frequency (DTMF) keypress capture
DPDP Act & Regulatory Vault
Engineered specifically for the Indian regulatory landscape. Automatic scrubbing against TRAI NCPR/DND lists and strict enforcement of RBI debt collection calling hours.
- › Automated calling-window lock (08:00 to 19:00 IST)
- › Real-time PII masking (Aadhaar, PAN, CVV, OTP)
- › SOC 2 Type II, ISO 27001, and CERT-In aligned
Enterprise Sync & Telemetry Vault
Instant disposition tagging and bi-directional synchronization with your systems of record: Salesforce, LeadSquared, Zoho, Finacle, Flexcube, and SAP.
- › Automated post-call structured summaries & CSAT
- › Real-time webhook dispatch and Kafka event streams
- › Encrypted dual-channel audio replay archive
Why generic LLM chains fail on Indian phone calls.
Traditional voice solutions stitch together generic American cloud APIs: an external STT, a US-hosted LLM, and a third-party TTS engine. The resulting 1.8-second delay feels robotic, breaks conversational flow, and leads to immediate customer hang-ups.
Paisan's unified speech-to-speech Indic architecture removes intermediate serialization layers, delivering sub-300ms turnarounds that mirror real human conversational pacing.
Contractual Guarantee
Sub-350ms 95th Percentile Latency SLA backed by service credits.
Deploy where your security policy dictates.
Choose from fully managed dedicated VPCs, on-premises air-gapped appliances, or our sovereign enterprise cloud.
Dedicated Private VPC
Deployed inside an isolated Virtual Private Cloud in your AWS (Mumbai), Azure (Central India), or GCP (Delhi) account with direct VPC peering.
High-growth Fintechs, NBFCs, Large D2C Brands & EdTech
On-Premises Appliance
Deployed directly inside your enterprise data center on Kubernetes (OpenShift, Rancher, or EKS-A). Zero outbound internet connectivity needed.
Scheduled Commercial Banks, PSU Lenders, Defense & Healthcare
Managed Sovereign Cloud
Turnkey cloud environment operated 24/7 by Paisan solutions engineers inside MeitY-empaneled Indian data centers.
High-Volume Outbound Campaigns, Rapid Pilots & BPOs
Direct SIP peering with India's leading carriers.
Bring Your Own Telephony (BYOT) or use Paisan's pre-configured carrier routes. Plug into your existing contact center infrastructure without replacing desk hardware.
From architecture sign-off to production in 4 weeks.
A battle-tested onboarding framework run by Paisan's dedicated solutions engineering and telecom operations teams.
Infosec & SIP Setup
Architecture review, VPC peering or hardware specs validation, DLT registration, and primary/secondary carrier SIP trunk provisioning.
Agent Tuning & Ingestion
Acoustic model calibration for your company's product terminology, prompt configuration, regional accent selection, and FAQ/knowledge ingestion.
CRM Sync & Shadow Run
Bi-directional webhook integration with CRM (Salesforce/LeadSquared), warm transfer testing, and 1,000 internal test calls evaluated by QA.
Production Cutover
Live traffic cutover with dedicated war-room bridge, SRE latency monitoring, and automated concurrency scaling up to target capacity.
Frequently Asked Technical Questions
Can Paisan be deployed completely air-gapped without internet access?
Yes. Our On-Premises Air-Gapped Appliance option deploys containerized Indic ASR, local reasoning LLMs, and neural TTS engines directly on your internal Kubernetes cluster (OpenShift, Rancher, or Bare-Metal K8s). Telephony is connected via internal PRI/SIP trunks, ensuring zero bits ever leave your data center perimeter.
How does Paisan enforce RBI debt collection calling windows?
Paisan's telephony campaign scheduler contains built-in regulatory guardrails aligned with RBI Fair Practices Code for Recovery. It strictly locks outbound dialing between 08:00 and 19:00 IST, auto-suppresses calls on national and regional bank holidays, and logs timestamped disposition proofs for every attempt.
How does instant barge-in interruption work in noisy environments?
Our edge audio pipeline runs a sub-15ms neural Voice Activity Detector (VAD) coupled with adaptive echo cancellation (AEC). When a customer speaks while the agent is talking, the system detects human vocal harmonics within 60–80ms, halts the TTS audio stream over the RTP leg immediately, and transitions back to active listening.
Can we use our existing carrier numbers and SIP trunks?
Yes. We support Bring Your Own Telephony (BYOT). You can peer your existing Tata, Airtel, Jio, or Exotel SIP trunks directly with our SBCs. Your caller IDs, DLT headers, and telecom billing remain under your own direct enterprise contract.
How is sensitive customer data (Aadhaar, PAN, Card CVV) protected?
Paisan incorporates real-time streaming PII masking at Layer 08. Aadhaar 12-digit numbers, PAN strings, and OTPs are redacted both in the textual transcript and audio recording stream before being committed to persistent storage. All data is encrypted with AES-256 at rest and TLS 1.3 / SRTP in transit.
Ready to deploy Paisan on your enterprise phone lines?
Speak directly with our enterprise solutions architecture team. We'll evaluate your call volume, design your carrier SIP topology, and configure a tailored proof-of-concept.