Plantronics Headset - Delay and power save

Hi, One of us end users heve two issues with the Plantronics headset (Savi 74x):

• The induced delay when picking up calls from the headset. It takes ~2 seconds (this is probably over-estimated) for the call and voice path to be established. Picking up from the handset button is immediate. 
• The headset goes into powersave mode after 1 hour.

I tought it may be because of COM objects utilisation in our software. Have you ever heard oubout this kind of issue? If yes, can we do something? Kind Regards.