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An Email Campaign may be launched during a Voice Quality or Call Performance task to test Multi-RAB performance. An Email Campaign tests whether email sent to the phone during a call disrupts performance as compared to phones not receiving email. An email campaign may be launched from the Email Campaign dialog.

Though not "built-in" to Umetrix Voice, this approach is equally valid for testing Multi-RAB performance:

• Engage the test device in data transfer using a Umetrix Data Test-Set while simultaneously testing voice quality or call performance with Umetrix Voice. Note that the phone must be able to support multi-threading / tasking for this approach to work.