Realms Header Specification

There are two System Settings that modify the way Operations Monitor assigns Realms to Calls/Registrations. By default Operations Monitor checks the To: and From: header for each SIP invite/SIP Registration message and matches this Call/Registration with all matching Realms (“or").

You can specify additional header fields in the System Setting named Headers in which to look for realm URIs. Diversion or P-Asserted-Identity could be useful values, depending on the configuration. Operations Monitor generally checks all the occurrences of each of these fields in each SIP Invite/Registration message. Exceptions are possible for header fields whose repetition is forbidden by the SIP standard.

Further customization is possible by:

• Matching a custom pattern against an arbitrary header field.
• Use the Custom header for realm definition System setting to specify which header to search for.

  Figure 7-50 Custom header for realm definition

  
  

  

  
  
• Use the Custom Header Pattern (optional) column on the Realms Patterns page to specify a pattern for each Realm. The pattern matching works similar to the number matching.

  Figure 7-51 Custom Header Pattern (optional)

  
  

  

  
  

Caution:

Each additional header and custom header matching affect the Operations Monitor's performance.