Abstract: A modem to modem communication system supports call waiting services by exchanging hold request and acknowledge signals before relinquishing the line servicing incoming calls. Thereafter, the modem to modem session is reestablished without having to redial. The hold request may be denied or accepted, and may define the duration a modem will hold before hanging up. The holding modem maintains the session by fooling the higher protocol layers, making them believe that the modem is not on hold. Three-way calling services are also used to free up the shared line for outgoing calls while maintaining the session with holding modems. A table may be employed to screen incoming calls through a comparison of the caller ID information with that in the table. The table may be within the modem or the host computer.

Abstract: A modem to modem communication system supports call waiting services by exchanging hold request and acknowledge signals before relinquishing the line servicing incoming calls. Thereafter, the modem to modem session is reestablished without having to redial. The hold request may be denied or accepted, and may define the duration a modem will hold before hanging up. The holding modem maintains the session by fooling the higher protocol layers, making them believe that the modem is not on hold. Three-way calling services are also used to free up the shared line for outgoing calls while maintaining the session with holding modems. A table may be employed to screen incoming calls through a comparison of the caller ID information with that in the table. The table may be within the modem or the host computer.

Abstract: A modem to modem communication system supports call waiting services by exchanging hold request and acknowledge signals before relinquishing the line servicing incoming calls. Thereafter, the modem to modem session is reestablished without having to redial. The hold request may be denied or accepted, and may define the duration a modem will hold before hanging up. The holding modem maintains the session by fooling the higher protocol layers, making them believe that the modem is not on hold. Three-way calling services are also used to free up the shared line for outgoing calls while maintaining the session with holding modems. A table may be employed to screen incoming calls through a comparison of the caller ID information with that in the table. The table may be within the modem or the host computer.

Abstract: Provided is a method for preparing an explosive emulsion. The method comprises first preparing an oil phase containing a hydrocarbyl-substituted anhydride, and preparing an aqueous phase containing an hydroxy amine, and preferably an oxidizer salt. The two phases are then mixed sufficiently to create a water-in-oil emulsion, with the anhydride and amine reacting at the interface of the two phases.

Abstract: The present invention provides a water-in-oil explosive emulsion comprised of a continuous oil phase; a discontinuous aqueous phase containing a functional component and an emulsifying amount of a hydrocarbyl-substituted carboxylic acid or anhydride or ester or another derivation of said acid or anhydride; where the pH of the aqueous phase has been adjusted to a pH of at least 6.0 by the addition of a base other than the functional component. It has been discovered that the adjustment of the pH of the aqueous phase to a pH of at least 6.0 results in a considerably stable emulsion, even when the hydrocarbyl-substituted emulsifier is not aminated. A further stabilization of the emulsion can be accomplished through the use of sensitizing agents such as microspheres in order to ease handling and repumping of the explosive emulsion.