In my travels there have been times when I’ve engaged in some very long phone calls. It may be that I’m speaking to my wife while killing time in some far off hotel, or perhaps consulting with an associate on a tech support matter. In such circumstances I’ve come to believe that a USB attached speakerphone and a soft phone can be a very convenient combination.
USB attached audio devices are handy when you have a computer readily available. Being USB attached they save you the trouble of finding a way to provide network connectivity for a traditional IP conference phone.