The present invention provides a method for implementing automated call routing using an origin identifier within a telematics equipped mobile vehicle that includes receiving an incoming call signal, the incoming call signal including an origin identifier, determining an answer mode based on the origin identifier of the incoming call signal, initiating the answer mode responsive to the answer mode determination, and operating the telematics unit based on the initiated answer mode. Origin identifiers may include an automatic number identifier and a digital signature. The step of determining the answer mode may include determining a first answer mode when the origin identifier is within a predetermined group of origin identifiers and determining a second answer mode when the origin identifier is not within the predetermined group of origin identifiers.