3Com® VCX V7111 VoIP Gateway User Guide 9Internal Firewall 342Network Port Usage 344Recommended Practices 345Legal Notice 345Readers Notes 346C HAPTER 13: D IAGNOSTICS 347Self-Testing 347V7111 Gateway Line Testing 348Syslog Support 349Syslog Servers 350Operation 350Readers Notes 351C HAPTER 14: SNMP-B ASED MANAGEMENT 353About SNMP 353SNMP Message Standard 353SNMP MIB Objects 354SNMP Extensibility Feature 355Carrier Grade Alarm System 355Active Alarm Table 356Alarm History 356Cold Start Trap 356Third-Party Performance Monitoring Measurements 357Total Counters 358Supported MIBs 358Traps 361SNMP Interface Details 362SNMP Community Names 363SNMP v3 USM Users 365Trusted Managers 367SNMP Ports 369Multiple SNMP Trap Destinations 369SNMP Manager Backward Compatibility 372SNMP NAT Traversal 373SNMP Administrative State Control 373Node Maintenance 373
