What are bandwidth profiles in Sync Rooms?
Sync Rooms automatically adapt to your network in real time using “banded” profiles.
Audio gets top priority so conversations stay clear.
Video bitrate is capped for stability and will pause on poor networks, then re‑enable after the connection stabilizes.
In the lobby, slow connections are detected early and camera preview is skipped so you can join faster.
Network Quality Levels and Video Management
Uses Twilio's network quality levels (1–5 scale):
Network Quality Level 1–2 (Poor)
Action: Video is DISABLED immediately
Trigger: Any quality level ≤ 2
Message shown: "📶 Poor Network Detected - Video paused to maintain audio quality"
Audio: Remains active with priority
Network Quality Level 3 (Fair)
Action: Maintains current state (no changes)
Behavior: If video was off, it stays off; if on, it stays on
Network Quality Level 4–5 (Good)
Action: Video is RE-ENABLED after stability check
Requirement: Maintain level ≥ 4 for 2 consecutive checks (QUALITY_STABLE_THRESHOLD = 2)
Purpose: Prevents rapid on/off switching (hysteresis)
Lobby Network Detection (Pre‑Room Entry)
In the lobby, the system detects slow networks using:
Downlink speed: ≤ 1.5 Mbps triggers "slow network" mode
Connection type: 'slow-2g', '2g', or '3g' triggers optimization
Round‑trip time: > 300 ms indicates slow connection
Fallback test: Tiny test image load time > 500 ms
When slow network is detected in lobby:
Camera/microphone preview is SKIPPED entirely
Shows "Slow connection detected - Preview disabled for faster loading"
Users can still join the room immediately when available
