| 摘要 |
<p>A hand held device, much like a cell phone or PDA, contains both a data server and a data client along with the voice messaging of a cell phone. The data 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 a wide area network. Spare network bandwidth may be used for transferring information. The information may include emails that are received and stored for later review for ultimately transferring to a local computer. Status may include knowing available memory and message sizes. Messages that are too large may be noted for later retrieval. On-board memory includes RAM. ROM, and removable modules that may be physically removed and run at a local computing system.</p> |
