I am also believe that the qualification of telephone numbers with "phone:XXX" would be the best. In such a case, the tag "phone" could be the telephone exchange and the identifiers "phone:customer-service" or "phone:order-board" pose a direct line in these departments. (Similar is possible for the departments of city goverment or a hospital) with best regards Thomas G.M. Mainka

I am also believe that the qualification of telephone numbers with "phone:XXX" would be the best. In such a case, the tag "phone" could be the telephone exchange and the identifiers "phone:customer-service" or "phone:order-board" pose a direct line in these departments. (Similar is possible for the departments of city goverment or a hospital) with best regards Thomas G.M. Mainka