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kambidi1973/README.md

Gopala Rao Kambidi

Senior Technology Architect / Technical Manager — 21+ years building carrier-grade VoIP, IMS, and Telecom solutions
M.Tech, IIT Kharagpur — Telecommunications Systems Engineering

Currently architecting enterprise provisioning and voice platforms at Infosys for Verizon and Comcast. Previously led VoIP product development at TATA ELXSI, built ISDN-PBX systems and VoIP gateways at ITI Ltd R&D.

I build the systems that make phone calls work.

Technical Focus

Voice Engineering       SIP | H.323 | MGCP | MEGACO | RTP/RTCP | SRTP
                        WebRTC | SDP | ICE/STUN/TURN | DTLS-SRTP

IMS / 3GPP              P-CSCF | I-CSCF | S-CSCF | HSS | AS
                        Diameter Cx/Dx/Sh | iFC | AKA Authentication

5G / NFV / SDN          AMF | SMF | UPF | NSSF | NRF | PCF
                        ETSI MANO | Network Slicing | VNF Orchestration

OSS/BSS                 Service Provisioning | Order Management | LNP
                        Billing/Rating | Inventory | Number Porting

Infrastructure          SBC (ACME, BroadSoft) | CMTS (Cisco, Arris)
                        Cable (DOCSIS 3.1, PacketCable 2.0)

Languages & Frameworks  Java 17 | Spring Boot | Spring Cloud | Python
                        C/C++ | FastAPI | REST | Microservices

Cloud & DevOps          AWS | Docker | Kubernetes | Helm
                        Jenkins | CI/CD | GitLab | Terraform

Open Source

Active contributor to the VoIP and telecom open source ecosystem. Building tools and contributing to projects used in production networks worldwide.

My Projects

Repository Tech What It Does
sip-flow-analyzer Python Full SIP/RTP protocol analysis — parser, call flow engine, PCAP reader, load tester, QoS monitor with ITU-T G.107 E-model MOS scoring
ims-cloud-core Java / Spring Boot Cloud-native 3GPP IMS core — P-CSCF, S-CSCF, HSS, Telephony AS as microservices with Diameter Cx simulation
ai-voip-quality Python / ML ML pipeline for VoIP quality — MOS prediction, anomaly detection, Erlang B/C capacity planning, codec recommendation
telecom-provision-engine Java / Spring Cloud OSS/BSS provisioning platform — order management, workflow engine, number porting, billing, 8 microservices
5g-network-slice-manager Python / FastAPI 5G network slice lifecycle — ETSI MANO orchestration, eMBB/URLLC/mMTC templates, SLA monitoring
webrtc-sip-bridge Python / JS WebRTC↔SIP gateway — SDP translation (ICE, DTLS-SRTP, BUNDLE), SIP transaction layer, browser softphone
sbc-guardian Python Multi-vendor SBC fleet management — config versioning, real-time analytics, capacity planning
sip-sentinel Python SIP security auditor — deep packet inspection, RFC 3261 compliance, vulnerability detection

Contributing To

Project Stars Role
Kamailio 2.8k ★ SIP server — testing, SIP module contributions
Asterisk 3.2k ★ PBX platform — VoIP integration testing
pjproject 2.6k ★ SIP/media library — SDP and codec work
open5gs 2.5k ★ 5G/LTE core — NF testing and deployment
free5GC 2.3k ★ 5G core network — testing and docs
HOMER 1.9k ★ SIP capture/monitoring platform
baresip 2.0k ★ Modular SIP user-agent
OpenSIPS 1.5k ★ SIP server and proxy
OpenAirInterface OAI 5G RAN implementation
Routr 1.7k ★ Programmable SIP server

Career

Infosys Ltd — Senior Technology Architect (2016 – Present)

  • Architected VDDS provisioning platform for Verizon — Java/Spring Boot microservices on AWS serving global IP/Telecom service activation
  • Led Comcast Business Voice engineering — SIP Trunking, Business Voice Edge, Commercial IMS, Cross Rate Center Porting
  • Built and mentored teams of 10-15 engineers across design, development, and QA

TekWissen / TATA ELXSI — Senior Architect / Senior Specialist (2004 – 2016)

  • Certified BroadSoft R16/R17/R18 server complex in Comcast core voice network
  • Integrated ACME-9200/4500 SBCs, certified 20+ CPE devices with CMTS infrastructure
  • Built TELTAF voice automation framework for Comcast BCV platforms
  • Designed LifeSize H.323-H.320 video conferencing gateway with AES-128 encryption

ITI Ltd R&D — Executive Engineer / Research Scientist (1997 – 2004)

  • Designed VoIP Voice Gateway (PSTN↔H.323), ISDN-PBX with BRI/PRI/SS7
  • Built embedded telephone exchange for defense communications
  • Hardware + software design on 80C31, 80C186, PPC platforms

Education & Certifications
M.Tech Electrical & Electronics Communications Engineering — IIT Kharagpur (1997)
B.Tech Electronics & Communications Engineering — JNTU Kakinada (1995)
Certifications BroadSoft NS/OM · Adtran AOS · Avaya
Award Extra Mile Award — TATA ELXSI

Key Standards & Protocols

RFC 3261 RFC 3550 RFC 4566 RFC 3311 RFC 3515 RFC 4733 ITU-T G.107 ITU-T G.711 ITU-T G.729
3GPP TS 23.228 3GPP TS 29.228 3GPP TS 23.501 3GPP TS 28.530 ETSI GS NFV-MAN 001
DOCSIS 3.1 PacketCable 2.0 SS7 MTP L1/L2/L3 ISDN PRI/BRI

kambidi@gmail.com · Chennai, India · github.com/kambidi1973

Popular repositories Loading

  1. opensips opensips Public

    Forked from OpenSIPS/opensips

    OpenSIPS is a GPL implementation of a multi-functionality SIP Server that targets to deliver a high-level technical solution (performance, security and quality) to be used in professional SIP serve…

    C 1

  2. sip-sentinel sip-sentinel Public

    SIP Protocol Analyzer & Security Auditor - Deep packet inspection for VoIP/SIP traffic with RFC 3261 compliance checking, security vulnerability detection, and call flow analysis

    Python

  3. sbc-guardian sbc-guardian Public

    Session Border Controller Management & Monitoring Platform - Multi-vendor SBC fleet management with real-time analytics, config versioning, and capacity planning

    Python

  4. telecom-provision-hub telecom-provision-hub Public

    Telecom Service Provisioning & Order Management Platform - Microservices-based provisioning engine with Saga orchestration, number porting, and Kubernetes deployment

    Java

  5. ims-provisioning-engine ims-provisioning-engine Public

    IMS Subscriber Provisioning Engine - 3GPP-compliant IMS subscriber lifecycle management with Diameter Cx/Sh HSS integration and Initial Filter Criteria engine

    Java

  6. voip-quality-monitor voip-quality-monitor Public

    Real-time VoIP Call Quality Monitoring - ITU-T G.107 E-model MOS scoring, RTCP analytics, jitter/loss detection with Prometheus/Grafana integration

    Python