Anybody using PlanTronics CS50 model?

Hi Friends,

This is Chandra from India;. I got Plantronics CS50 model from USA. I am trying to connect this with Polycom IP 501 phone. But, power is not coming to Plantronics CS50 device. What may be the reason? Is this model works in India? Please tell me.

Look forward to your response. Thank you.