Stateless Proxy Mode

The stateless proxy mode is the most basic form of SIP operation. The stateless proxy mode:

• Has the least number of messages per call. No record route header is added and there are no 100 Trying or BYEs.
• Does not keep transaction state (timers and retransmission). There are no session counters and no session stop time. No session stop time means no RADIUS STOP records.
• Has no limits on session state.
• Can restrict functionality by specification. This can mean no media management, limited potential for RADIUS accounting, and no CALEA (no Release/BYE messages for CDC).
• Acts primarily as a routing device, with local policy routing and ENUM routing.