Solution: Point to NTP server via <ntpServer>pool.ntp.org</ntpServer> in config.
Based on historical Cisco release notes: cmterm 7941 7961 sip 8 5 4 zipl
| Use case | Verdict | |----------|---------| | Home lab / retro VoIP | ✅ Acceptable | | Small business (non-critical) | ⚠️ With caution (isolate VLAN) | | Enterprise production | ❌ Strongly discouraged | | Internet-facing | ❌ Dangerous | Solution: Point to NTP server via <ntpServer>pool