Abstract: An embedded modem for an unattended host device that provides improved cellular communications capabilities to the unattended host device. The embedded modem detects the occurrence of a signal effectiveness event reflective of the reliability of a cellular communication session, and upon detecting the occurrence of a signal effectiveness event, issues commands to improve the reliability of the cellular communications. The signal effectiveness event data can be communicated by the embedded modem on channel that is different from a channel provided for the host device to communicate its own data with an associated remote computer system.

Abstract: The specification describes a high capacity nonvolatile CCD read only memory system that includes a plurality of memory cells. Selected ones of the memory cells include a double-diffused region having a first and second implant or diffusion under a clocked electrode whereby the first implant or diffusion provides a fixed charge required for ROM operation and the charge and polarity of said second implant or diffusion provides a neutralizing effect on the surface potential under the clocked electrode and above the double implanted or double diffused region.

Abstract: The specification describes a high capacity nonvolatile CCD read only memory system that includes a plurality of memory cells. Selected ones of the memory cells include a double-diffused region having a first and second implant or diffusion under a clocked electrode whereby the first implant or diffusion provides a fixed charge required for ROM operation and the charge and polarity of said second implant or diffusion provides a neutralizing effect on the surface potential under the clocked electrode and above the double implanted or double diffused region.