Some VoIP calls cannot last more than 30 seconds.

Symptom:

Some VoIP calls cannot last more than 30 seconds.

Condition or Workaround:

Occurs when a call is placed from an Avaya IP PBX using two record routes and is sent out through a SonicWall UTM.

Resolution:

Upgrading to SonicOS Enhanced 5.5.2.0 release resolves the issue.

Tracking ID:  83381

Source: SonicOS Enhanced 5.5.2.0 Release Notes