AudioCodes Mediant 3000, User Manual

Page: 441 / 872

Version 6.6 441 Mediant 3000
User's Manual 29. SBC Configuration
processes. If the classification rule is defined as a blacklist, the SIP dialog is denied.
If the classification process fails, the device rejects or allows the call, depending on the
setting of the 'Unclassified Calls' parameter (on the General Settings page -
Configuration
tab > VoIP menu > SBC > General Settings ). If this parameter is set to Allow , the
incoming SIP dialog is assigned to an IP Group as follows:
1. The device checks on which SIP listening port (e.g., 5061) the incoming SIP dialog
request arrived and the SIP Interface which is configured with this port (in the SIP
Interface table).
2. The device checks the SRD that is associated with this SIP Interface (in the SIP
Interface table) and then classifies the SIP dialog with the first IP Group that is
associated with this SRD. For example, if IP Groups 3 and 4 use the same SRD, the
device classifies the call to IP Group 3.
Note: If classification for a SIP request fails and the device is configured to reject
unclassified calls, the device can send a specific SIP response code per SIP
interface, configured by the 'Classification Failure Response Type' parameter
in the SIP Interface table (see 'Configuring SIP Interface Table' on page
227 ).
The flowchart below illustrates the classification process:
Figure 29-4: Classification Process (Identifying IP Group or Rejecting Call)