VoIP Availability Manager monitors the network by sending Simple Network Management Protocol (SNMP) polls and by processing SNMP traps, by sending Simple Object Access Protocol (SOAP) requests and by processing the responses, and by processing information from the VoIP Performance Manager. The results of the polling and trap processing are then compared to threshold values that define acceptable and unacceptable levels of availability. The polling and trap processing results, in conjunction with the status updates received from IP Availability Manager, are used to diagnose the failed objects that interrupt network service connectivity.
VoIP Availability Manager uses settings to assign polling and threshold parameters to groups of managed objects. From a polling and threshold perspective, a setting is a collection of parameters common to a particular type of analysis (for example, network services polling).
Using the Polling and Thresholds Console, you can customize SNMP polling and SOAP querying for VoIP Availability Manager by modifying default polling groups or by creating new polling groups. The polling groups periodically poll or query the managed devices to collect availability data for application services, network services, and other VoIP-related objects. The data serves as input to the correlation analysis function of VoIP Availability Manager.
Appendix B, Polling for Analysis, describes SNMP and SOAP polling for correlation analysis.