| http://www.w3.org/ns/prov#value | - In one embodiment, the portable unit 14 (including an antenna 18) communicates with a railroad service shop 16 via any of the well-known wireless or wired communication systems and protocols, including an Internet connection using the TCP/IP protocols, tone modems, ISDN or XDSL protocols over the public switched telephone network or a cable modem.
|
