soft phone
n.— «The new system will use phones known in the industry as “soft phones” because they are embedded in computers, and “everything is fully redundant, so if a line gets cut, there are no single points of failure in the system,” Mr. Cosgrove said. He said there are also plans to feed images from street cameras into the 911 call centers.» —“For $1.5 Billion, New York Plans a Much-Delayed Overhaul of 911″ by Al Baker New York Times July 3, 2007. (source: Double-Tongued Dictionary)