I am using the VVX 500 and 600 in a Broadsoft environment. When the 500 or 600 are brought out of Power Saving mode, their BLF appearances are missing. I have verified that the BLF URI is still provisioned in the configuration file on the server, and all I have to do to get the back is restart the phone. Of course that is a huge inconvenience for our customers. I ran a protocol analyzer on a phone that was in power save mode, and I can see the subscribe messages being sent to the server. However, I only watched for 4 hours. Is there a timer that stops the subscribe messages after a certain amount of time?