title: Detect incoming call from a GSM modem in c#
body: <p>I am developing a C# application to make and receive calls from a GSM modem. I am using a <code>timer_tick</code> event to regularly read the port using <code>port.ReadExisting()</code> and comparing it with <code>RING</code>. If there is a match, display in a label that there is an incoming call. However I couldn't get it to work. Looking for suggestions. </p>