# SIP on Kubernetes<no value>

# SIP on Kubernetes

SIP clients and trunks send requests to a `SIPGateway`. Kamailio authenticates
callers, selects routes from PostgreSQL runtime data, and asks RTPengine to
rewrite SDP for media relay. Calls can target registered SIP users, outbound
trunks, or Asterisk application pods.

For external traffic, use `NetworkProfile` and component-level external address
settings to control what SIP and RTP endpoints advertise.