| 摘要 |
A hand held device, much like a cell phone of PDA, contains both a data serv er and client server along with the voice messaging of a cell phone. The server communicates through a TCP/IP stack with a local computing system via IR, short distance wireless, a serial bus or Ethernet. The data client communicates with a remote server via a voice network or wireless to the Internet also via a TCP/IP stack and wide area network. Spare network bandwidth may be used for transferring information. The information may emai ls that are received and stored for later review for ultimately transferring to a local computer. Status may include knowing available memory and sizes of messages. Messages that are too large may be noted for later retrieval. On- board memory includes RAM, ROM, and removable modules that may be physically run at a local computing system.
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