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Phongthep PhimthongSenior Voice & System Architect
Enterprise Voice & Systems Architect
Senior System Engineer @ JADS COMMUTCC B.Eng Computer & AI Candidate

Precision Voice.
Deterministic Core.

I am Phongthep Phimthong — engineering carrier-grade Avaya PBX clusters, Session Border Controllers, VMware virtualization, and mission-critical AI-driven automated workflows.

99.999% SLA Uptime
Avaya Aura CM & Session Manager
AI Telecom Automation (n8n + LLM)
VMware ESXi 8.0 & Portgroup Security
Explore Architecture Case StudiesGitHubLinkedInDirect Inquiry
Current PostingSenior System EngineerJADS COMM LIMITED
Core TelephonyAvaya Aura & ASBCESession Manager • IP Office
Academic DegreeB.Eng. CompEng & AIUTCC (Graduating Late 2026)
CertificationsYeastar Specialist & LINK3x Certified Specialist
Selected Production Deployments

Architectures & Works.

Real enterprise telephony deployments, telecom automation pipelines, and infrastructure security engineered for tier-1 financial and corporate institutions.

01 / Voice Core2026

Avaya Aura® Enterprise Core & Session Manager HA Cluster

Carrier-Grade 99.999% Voice Infrastructure with Redundant SIP Trunking

Architected and deployed enterprise-scale Avaya Aura Communication Manager (CM 8.1/10) with Session Manager (SM) clusters, ASBCE perimeter security, and dual-homed SIP trunks across redundant data centers.

Call Uptime99.999%
Concurrent Calls3,000+
Failover Time< 1.5s
Jitter Guarantee< 8ms
  • Dynamic SIP Entity Link failover across active-passive Session Managers
  • Automated Session Border Controller TLS certificate life-cycle rotation
Avaya Aura CMSession ManagerASBCESIP Trunking
Read Architecture Spec
02 / AI & Automation2026

Autonomous Voice Operations & Telegram One-Click Dispatcher

AI-Powered Helpdesk Sync, Morning Standup Briefings & One-Click Follow-Up Mail

Built a fully autonomous telecom operations engine integrating LINE OA, Telegram Bot (@phongthep_alert_bot), Odoo ERP, and Groq LLM (gpt-oss-120b) to automate incident triaging, ticket tracking, and SMTP follow-up dispatching.

Manual Effort Reduction85%
Response Latency< 2.1s
Email Dispatch Time1-Click
Accuracy Rate100% Factual
  • Telegram inline keyboard webhook listener with authenticated user verification
  • Automatic Odoo Chatter sync rendering green outbound email cards
n8n Workflow EnginePython 3Groq AI (gpt-oss-120b)Odoo 17 ERP
Read Architecture Spec
03 / Network & Cloud2025

Enterprise Voice VLAN, QoS & Perimeter Security Hardening

Deterministic Packet Delivery & Anti-Toll Fraud Voice Network Architecture

Engineered segregated Voice VLANs with 802.1Q tagging, DiffServ QoS DSCP 46 (EF) policies, and firewall stateful inspection, completely eliminating voice packet loss and jitter.

Packet Loss0.001%
Jitter< 4.2ms
MOS Audio Score4.41 / 5
Fraud Attempts Blocked100%
  • Dynamic Voice VLAN tagging via LLDP-MED and CDP
  • SIP ALG permanent deactivation preventing SDP packet mutilation
Voice VLAN (802.1Q)QoS DSCP 46 (EF)Firewall ACLsDHCP Option 242
Read Architecture Spec
04 / Security2024 – 2026

Mission-Critical Virtualization on VMware ESXi & Proxmox VE

Hardware-Pinned Virtual Infrastructure for Real-Time Telecom Workloads

Designed and deployed VMware ESXi 7.0/8.0 and Proxmox VE virtualized clusters hosting Avaya Aura, SBC, Asterisk, and Linux service daemons with 100% CPU/RAM reservation and sub-millisecond NTP sync.

Host Latency< 0.8ms
Time Drift< 5ms
VM Density24+ Voice VMs
Recovery Time (RTO)< 15 mins
  • Dedicated vSwitch uplinks for RTP voice media and management traffic
  • Zero CPU overcommit for hard real-time voice processing
VMware ESXi 8.0vCenter ServerProxmox VEPort Group Security
Read Architecture Spec
Tactile Engineering Workbench

The Telecom Lab.

Interactive telemetry sandbox demonstrating real-world VoIP signaling logic, node health checks, and engineering mental models.

Select Telephony Cluster
telecom-probe@phongthep-lab:~#

Target: SM Telephony Node

64 bytes from 192.168.10.250: icmp_seq=1 ttl=64 time=0.42 ms (Jitter: 0.02ms)
64 bytes from 192.168.10.250: icmp_seq=2 ttl=64 time=0.38 ms (Jitter: 0.01ms)
64 bytes from 192.168.10.250: icmp_seq=3 ttl=64 time=0.45 ms (Jitter: 0.03ms)
SIP OPTIONS keepalive: 200 OK from Avaya SM (State: IN_SERVICE, Latency: 0.8ms)
RTP Codec: G.711u / G.729AB (Packetization: 20ms)DSCP 46 (EF) STRICT PRIORITY
Professional Trajectory

Work Experience.

Over 3 years of hands-on production engineering in high-stakes telecom networks, enterprise PBX rollouts, and telecom DevOps automation.

01June 2026 – PresentFull-Time

Senior System Engineer

JADS COMM LIMITED • Bangkok, Thailand

Key Deliverables & Responsibilities:

Install, configure, and maintain enterprise Avaya PBX systems and integrated communication infrastructure across major financial, energy, and corporate clients.
Deploy and manage Session Border Controllers (ASBCE), configuring SIP trunks, dial plans, TLS/SRTP security, NAT, and Voice VLANs for high-capacity contact centers.
Design, deploy, and manage virtualized environments using VMware ESXi 8.0 and Proxmox VE, ensuring 100% CPU/RAM reservation for real-time voice nodes.
Monitor and troubleshoot SIP/SRTP call flows using logs, packet captures (sngrep, tcpdump), and telemetry tools to ensure end-to-end carrier interoperability.
Build AI-driven operations pipelines with n8n, Python, and Groq LLMs for automated case follow-ups, daily standup briefings, and Odoo CRM integration.
Technologies:Avaya Aura CMSession ManagerASBCEVMware ESXin8nPythonSIP / SRTPOdoo 17QoS
02June 2025 – December 2025Full-Time

Network Voice Engineer

Tecnomic Systems (Thailand) Co., Ltd. • Bangkok, Thailand
03August 2024 – June 2025Contract / Project

Network Engineer – Project Management

Advanced Info Service PLC. (AIS) • Bangkok, Thailand
04December 2023 – September 2024Full-Time

Project Engineer

Poise Technology Co., Ltd • Bangkok, Thailand
Engineering Philosophy

Evidence over Assumption.

In mission-critical voice engineering, there is no margin for hallucination or guessing. Every dropped packet, broken SIP INVITE, or one-way audio symptom has a deterministic root cause in the protocol stack.

My approach pairs strict deep-packet verification (traceSM, sngrep, tcpdump) with high-availability infrastructure design (VMware ESXi, ASBCE, Session Manager Cassandra synchronization) and forward-thinking AI workflow automation.

Academic Foundation

Bachelor of Engineering in Computer Engineering & Artificial Intelligence

University of the Thai Chamber of Commerce (UTCC)

Curriculum focused on Machine Learning, Computer Systems, High-Performance Networking, and Embedded AI. Graduating Late 2026.

Period: 2022 – Late 2026 (Expected Graduation)Final Year Honors
Verified Industry Certifications
Yeastar Certified: Engineering Specialist
Yeastar Information Technology Co., Ltd.
Jan 2024
Yeastar Certified: Cloud Associate
Yeastar Information Technology Co., Ltd.
Jan 2024
Yeastar Certified: Integration Specialist
Yeastar Information Technology Co., Ltd.
Jan 2024
LINK Certified Network Cabling for Engineering (LCCE)
INTERLINK TELECOM / LINK Corp.
2025
100% Industry Verified
Technical Stack & Protocol Matrix

Domains of Expertise.

Voice & Telecom Systems
Avaya Aura CM (8.1 / 10)Session Manager (SM)System Manager (SMGR)Avaya SBC (ASBCE)IP Office (IPO)Yeastar P-Series / S-SeriesAsterisk & FreePBXSIP RFC 3261TLS & SRTP EncryptionAudio Codecs (G.711, G.729, Opus)H.323 & H.248 GatewaysPush Notifications (APNs/FCM)
Network & Security Engineering
Voice VLAN (802.1Q Tagging)QoS & DiffServ (DSCP 46 / EF)Access Control Lists (ACLs)SIP ALG MitigationFar-End NAT Traversal & STUNVPC & VPN (WireGuard / IPSec)MPLS & SD-WANDHCP Option 242 / 176DNS SRV & NAPTR RecordsPacket Sniffing (sngrep, tcpdump)Cisco, Fortinet & MikroTik
Virtualization & Cloud Infrastructure
VMware ESXi 7.0 / 8.0vCenter ServervSwitch Port Group SecurityProxmox VE & KVMAWS (EC2, VPC, Route53)Docker & ContainerizationChrony & NTP Clock SyncSAN / NFS Storage IOPS TuningOracle Linux / RHEL / DebianDisaster Recovery (DR) & Backup
Automation, AI & DevOps
n8n Workflow AutomationPython 3 ScriptingLarge Language Models (Groq / OpenAI)Voice AI & Real-Time AgentsOdoo 17 ERP (Helpdesk, CRM)Telegram Bot APILINE Messaging APIRESTful APIs & WebhooksBash / Zsh Shell AutomationSystemd Service Engineering