We are using Cisco SPA504g phones. When someone uses the phone system to page and if we happen to be using our phones at the time, the call we are on is placed on hold while the page is made. The call isn't dropped. Usually what happens is it was unexpected and the caller thinks something happened and they hang up. Is this normal behavior? I would expect that if I am on a call, the page would not come through my intercom since my phone is busy. I do not want calls placed on hold while a page is done. Thank you!