Master VOS3000 SIP NAT keep alive configuration with HELLO message, period, interval, and quantity settings to prevent NAT timeout and maintain VoIP registrations.
VOS3000 SIP Session Timer: Powerful RFC 4028 Setup Guide
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.
