Need to have the lamp only feature to light a Viking VR-1A Universal Visual Indicator that is connected to a Cisco ATA186. Presently all I can get is stutter tone out of the ATA and it drives the indicator crazy. Can not turn the light off after checking messages. Put in a regular phone with a light and is doesn't work either. Only stutter tone. Is it possible for the CCM or ATA to provide lamp only to this device once CallPilot send the MWI?