ADVANCED 8000 concurrent sockets per hour infrastructure

1️⃣ Current structure: (100 concurrent sockets // no phone numbers & telephony redundancy) Currently we have an agent with a 100 call concurrency limit using these tools: TTS - Eleven labs STT - Soniox LLM - Grok 4.0 Database - MongoDB Concurrency - Railway Telephony - Telnyx Coder - Antigravity 2️⃣ Your PROPOSED structure: (For 8000+ concurrent sockets AND PROVEN phone numbers & telephony redundancy) // ANSWER EACH line below as ROOTED in YOUR real experience as possible: 1️⃣ TTS - Which one based on your extensive experience? What is the fallback TTS in case this one fails? Have you tested Gradium before? We want to use voices that have NO cost here which. Is totally possible while still sounding equal or better to Eleven labs Answer based on real experience not theory please We’re extremely advanced (not new at this) We will know if this a non researched answer 2️⃣ STT - Which one based on your extensive experience and why? Also what is the fallback STT for lowest latency while still being accurate in case this one fails? 3️⃣ LLM - Which one based on your extensive experience and WHY? Also what is the fallback LLm in case this one fails? 4️⃣ Database - Which one based on your extensive experience? What is your proposed fallback DB case this one fails at this scale? 5️⃣ Concurrency - Which one based on your extensive experience? Do NOT suggest AWS here // we want the lowest cost of maintenance possible while still being relaiable and AWS isn’t either!!! We want max Lowest possible cost in this and still being reliable (8000 concurrent sockets isn’t that crazy of a scale) What is your 2Nd alternative to this in case it fails? 6️⃣ Telephony - Which one based on your extensive experience? Do NOT answer twillio // lowest cost plus higher deliverability here is the concern Answer with your #1 preferred provider Then #2 and #3 and why please (be impressive) 7️⃣ Coder - Which one based on your current workflow? Answer with your current PARALLEL development workflow - what are you using to manage 8+ instances at a time while you code and which coder and model? Proposed NEW structure & tools: (tell us here in your answer 👆👆) REMEMBER we’re NOT new at this so carefully choose your answers and tell us WHY you’re choosing each piece Lastly do let me know if this is too challenging to answer from your experience!!! If you don’t have extensive experience with some of these questions please be honest and tell me please Answer each question in here as extensively and as tactically as possible (impress us)