I have my Cisco 524 phone connected to my UC500. It has two lines active at the moment. One of the line is private and the second line is shared with another 524 phone. I have received complaints from other colleagues and clients that my private phone line is gives busy tone when dialed sometimes. I have noticed that there was not any active call on either of the numbers. I even tested that my self by ringing my private number from my mobile phone and I got the same busy tone whereas there wasn't any active call on the private or shared line whatsoever. Can anybody suggest me some solution on it?
Another issue I face is that sometimes my phone doesn't recognise the keypad inputs, prompted by the number to which I dialed. What could be the cause of this? Any help will be highly appreciated. Many Thanks.