Master VOS3000 SIP session timer with RFC 4028. Configure SS_SIP_SESSION_TTL, reinvite intervals, and early hangup to prevent ultra-long bills and ghost calls.
VOS3000 SIP Session Timer: Complete Keep-Alive & Session Management Important Guide
Master VOS3000 SIP session timer and NAT keep-alive. Complete guide to session management, call drop prevention, and timer configuration for VoIP reliability.