CallJots is the AI-powered VoIP platform born from over sixteen years of carrier-grade telecommunications experience from SS7 signalling and SIP/RTP infrastructure to real-time AI transcription. Every call is automatically converted into searchable, timestamped smart notes paid for with Bitcoin and settled on the Stellar XLM network.
From SS7 signalling networks to AI-powered VoIP every protocol we mastered, every carrier we integrated, every byte of CDR data we processed shaped the platform you're using today. This is the Joomo Enterprises story.
Joomo Enterprises entered the Telecom arena with SMSDAM, a carrier-grade Bulk Messaging Platform engineered from the ground up on the SMPP v3.4 protocol. At a time when enterprise messaging was dominated by expensive, closed-vendor stacks, SMSDAM offered operators and enterprises a robust, open-protocol alternative capable of handling millions of messages daily across MT (Mobile-Terminated) and MO (Mobile-Originated) message flows.
The platform integrated directly with operator SMSCs (Short Message Service Centres) over dedicated SMPP sessions, maintaining persistent TCP connections with full bind_transmitter / bind_receiver / bind_transceiver negotiation. Delivery confirmation relied on end-to-end DLR (Delivery Receipt) tracking routed back through the originating SMSC, giving enterprise clients real-time visibility into message delivery states from ENROUTE and DELIVRD through to UNDELIV error codes.
Routing intelligence was built on live HLR (Home Location Register) queries over SS7/MAP signalling, enabling SMSDAM to perform number portability lookups, validate MSISDN ranges, and route traffic across interconnected operators without revenue leakage. The billing engine natively consumed operator CDR (Call/Message Detail Record) feeds and supported pre-paid credit controls a capability that would later evolve into the full IN billing subsystem.
Growing operator demand pushed Joomo to expand beyond messaging into Convergent Billing. We built an Intelligent Network (IN) mediation layer compliant with CAMEL Phase 2 & 3 (CAP), connecting to operator SCP (Service Control Points) via INAP/CAP over SS7 to intercept prepaid call events, apply real-time charging, and enforce credit limits without breaking the bearer path.
The CDR pipeline was redesigned for carrier-scale throughput: raw ASN.1-encoded CDRs from MSCs and SMSCs were ingested, decoded, correlated across originating and terminating legs, and fed into a mediation engine that produced normalised records for downstream billing systems. We integrated with RADIUS for broadband session accounting and Diameter (RFC 6733) for EPC/LTE Online Charging giving our platform a foot in both legacy 2G/3G and emerging 4G/LTE domains.
Inter-operator settlement used the TAP3 (Transferred Account Procedure v3) roaming data exchange format mandated by the GSMA, enabling automated reconciliation of roaming charges between partner networks experience that would later inform our cross-border crypto settlement design.
The shift from circuit-switched PSTN to packet-switched VoIP (Voice over IP) was the defining technology transition of this era, and Joomo was in it from day one. We built out a carrier-grade VoIP core using Asterisk PBX and FreeSWITCH as session border functions, handling call signalling via SIP (RFC 3261) with full SDP (Session Description Protocol) offer/answer negotiation for codec selection supporting G.711 (PCMU/PCMA), G.729, G.722 wideband, and Opus for high-definition voice.
Media transport ran over RTP (RFC 3550) with SRTP (RFC 3711) for encrypted media streams, using DTLS-SRTP (RFC 5763) for key exchange the same mechanism now powering WebRTC endpoints in CallJots. NAT traversal was solved through a full STUN / TURN / ICE stack, allowing clients behind enterprise firewalls and carrier-grade NATs (CGN) to establish direct media paths. Call quality was monitored using RTCP metrics jitter, packet loss, and MOS (Mean Opinion Score) scoring feeding QoS dashboards used by interconnected carriers.
Carrier interconnects were provisioned over SIP trunks with Tier-1 operators, with call routing governed by LCR (Least Cost Routing) logic that factored in per-destination termination rates, codec compatibility, and real-time quality scores from RTCP feedback.
With a decade of call data and deep VoIP experience, the next logical step was intelligence. Joomo's R&D arm began investing in Automatic Speech Recognition (ASR) research, benchmarking acoustic models from Kaldi and wav2vec 2.0 through to OpenAI's Whisper and Google's Conformer architecture selecting the optimal combination for telephony-quality audio (8 kHz narrowband to 48 kHz wideband).
The NLP layer explored summarisation and information extraction using BART (Bidirectional and Auto-Regressive Transformers), T5 (Text-to-Text Transfer Transformer), and classification with BERT / RoBERTa fine-tuned on business conversation datasets. Speaker diarisation separating who said what was tackled with GMM-HMM speaker models and later upgraded to neural speaker embeddings.
Operationally, this period saw the adoption of Docker and Kubernetes for containerised microservice deployment, enabling the AI inference pipeline to scale independently of the core VoIP signalling a cloud-native architecture essential for the latencies demanded by real-time transcription.
Traditional telecom billing had always been constrained by correspondent banking relationships, inter-operator settlement delays, and high FX costs on cross-border traffic. We set out to dismantle those barriers entirely. After deep research into Layer-2 Bitcoin infrastructure, we adopted the Lightning Network as the primary payment rail enabling sub-second, micropayment-capable, trust-minimised settlement for per-minute call billing with transaction fees measured in satoshis.
For network-layer settlement between platform nodes and partner operators, we chose the Stellar (XLM) network: a purpose-built financial infrastructure with 35 second finality, native multi-asset support, and a decentralised exchange (SDEX) for on-chain currency conversion. Integration with the Stellar Anchor framework enables fiat on/off-ramp corridors in 180+ countries a settlement model that mirrors the TAP3 roaming reconciliation we built a decade earlier, but without the 30-day clearing cycle.
CallJots is the culmination of 16 years of Telecom and IT engineering at Joomo Enterprises. It is not a startup's first product it is a seasoned Telecom operator's answer to a universal problem: enterprises lose institutional knowledge every time a phone call ends without a reliable record.
We fused our carrier-grade VoIP core (SIP/RTP/SRTP, STUN/TURN/ICE, WebRTC) with a battle-tested AI transcription pipeline (Whisper + Conformer ASR, BART/T5 summarisation, GMM speaker diarisation) and wrapped it in a crypto-native billing layer (Bitcoin/Lightning + Stellar XLM). The result: every call becomes a timestamped, searchable, AI-summarised knowledge asset paid for in seconds, settled globally, owned entirely by you.
Three effortless steps transform every conversation into a timestamped, searchable knowledge base.
CallJots is built on the same protocol layers that run the world's telephone networks from SS7 signalling in the core to WebRTC at the browser edge. No shortcuts. No proprietary lock-in. Just battle-proven Telecom standards, re-engineered for the cloud.
All user-facing interactions browser calls, mobile clients, third-party API integrations operate over WebRTC for media and SIP for call control, secured end-to-end with TLS 1.3. Our REST API uses OAuth 2.0 bearer tokens and signed JWTs, ensuring every API call is both authenticated and auditable.
Voice media travels over SRTP (RFC 3711) with DTLS-SRTP key exchange, making every media stream encrypted by default no opt-in required. ICE/STUN/TURN handles NAT traversal for clients behind enterprise firewalls and carrier-grade NAT. RTCP feedback loops provide real-time jitter, loss, and MOS quality metrics used by our QoS engine to dynamically select the best codec Opus for wideband, G.711 for legacy interop.
Deep carrier integration is our heritage. SS7/MAP signalling for HLR queries and number portability, SMPP v3.4 for legacy SMSC interconnects, CAMEL/CAP for IN service triggers, and Diameter for LTE/EPC online charging all the protocols that keep the world's mobile networks running are part of our operational DNA at Joomo Enterprises. CallJots inherits this carrier-grade reliability in every call.
Our AI pipeline is purpose-built for telephony audio. Whisper and Conformer handle acoustic modelling across 848 kHz sample rates. BART and T5 produce abstractive summaries of call content, extracting decisions and action items. BERT/RoBERTa powers intent classification and keyword spotting. GMM-based speaker diarisation segments transcripts by speaker identity so every note knows exactly who said what.
Telecom billing has always been complex. We simplified it. Bitcoin/Lightning enables sub-second, satoshi-denominated micropayments per call minute no credit card, no bank required. Stellar XLM handles inter-node settlement with 35 second finality across 180+ countries, using the SDEX for on-chain FX conversion. It's the TAP3 roaming settlement model rebuilt for the blockchain era.
The platform runs on a containerised microservice architecture deployed via Kubernetes, with independent scaling for the VoIP core, AI inference pipeline, and billing engine. MySQL 8 stores call metadata and CDR records with ACID guarantees. Redis caches session state and ASR result queues. The CDR mediation pipeline a direct descendant of our 2010-era billing work provides the audit trail that enterprise compliance teams require.
Selected from our comprehensive algorithm research, these are the most productive models for Voice-to-Transcript-to-Notes pipelines.
"I jumped into the office Monday morning and began working on the new project. Logged into my CallJots and clicked on the tab for one week ago on the 16th. Then scrolled to the 2:08 PM team meeting call. The notes were all I needed "
CallJots is the first VoIP platform built natively on Bitcoin for user payments and the Stellar XLM network for instant, borderless platform settlement. We didn't add crypto as an afterthought we redesigned the billing stack from scratch using the same engineering rigour we applied to our CAMEL/CAP IN billing and TAP3 roaming settlement systems at Joomo Enterprises. The result: per-minute, per-call, or subscription billing settled in seconds not 30-day clearing cycles. No banks. No intermediaries. No borders. Payments as global as your calls.
Pay with Bitcoin. Settle in XLM. Cancel anytime.
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