Why Does a VoIP Call Lose Audio When a Second Person Joins the Conference?

Audio may fail when a third participant joins because of conference bridge capacity, codec negotiation, network bandwidth, or device behavior. One-to-one calls can work while group calls fail.

What to check

Compare call types, endpoint models, bridge logs, codec settings, bandwidth and packet loss, and participant network paths. Test different host devices and an internal conference bridge if available.

Recommended next step

Address the constrained bridge or network resource and validate a representative group call. Confirm call recording, hold, and transfer behavior after configuration changes.

How Informatix Systems can help

Informatix Systems provides VoIP and business communications services. We can review the affected setup, narrow down likely causes, and help plan a practical fix. Contact us with the platform involved, when the issue began, and non-sensitive error details.