Method for selectively controlling the propagation of dual-tone multi-frequency signals within a telecommunications network

A method for selectively controlling the propagation of dual-tone multi-frequency signals along a communications channel within a telecommunication network, comprising the steps of:

• monitoring the communications channel to detect, during a pre-answer period of a call initiated from a first network user to a second network user supported by the communications channel, one or more dual-tone multi-frequency signals transmitted along said communications channel by said first network user;
• prohibiting, in response to detection of a specific one or more dual-tone multi-frequency signals transmitted along said communications channel by said first network user, all dual-tone multi-frequency signals subsequently transmitted along said channel by said first network user from being propagated to said second network user;
• monitoring the communications channel to detect, after a call supported by the communications channel is completed between said first network user to said second network user, one or more dual-tone multi-frequency signals transmitted along said communications channel by said second network user;
• and
• prohibiting, in response to detection of a specific one or more dual-tone multi-frequency signals transmitted along said communications channel by said second network user, all dual-tone multi-frequency signals subsequently transmitted along said channel by said second network user from being propagated to said first network user.

A method for selectively controlling the propagation of dual-tone multi-frequency signals along a communications channel within a telecommunication network, comprising the steps of:

• monitoring the communications channel to detect, during a pre-answer period of a call initiated from a first network user to a second network user supported by the communications channel, one or more dual-tone multi-frequency signals transmitted along said communications channel by said first network user;
• prohibiting, in response to detection of a first specific one or more dual-tone multi-frequency signals transmitted along said communications channel by said first network user, all dual-tone multi-frequency signals subsequently transmitted along said channel by said first network user from being propagated to said second network user;
• monitoring the communications channel to detect, after a call supported by the communications channel is completed between said first network user to said second network user, one or more dual-tone multi-frequency signals transmitted along said communications channel by said first network user, and
• allowing, in response to detection of a second specific one or more dual-tone multi-frequency signals transmitted along said communications channel by said first network user, all dual-tone multi-frequency signals subsequently transmitted along said channel by said first network user to propagate to said second network user.

A method for selectively controlling the propagation of dual-tone multi-frequency signals along a communications channel within a telecommunication network, comprising the steps of:

• receiving, via said telecommunication network, during a pre-answer period of a call initiated from a first network user to a second network user supported by the communications channel, an identifying signal associated with said first network user;
• receiving, via said telecommunication network, during a pre-answer period of a call initiated from a first network user to a second network user supported by the communications channel, an identifying signal associated with said second network user;
• and
• prohibiting all dual-tone multi-frequency signals subsequently transmitted along said communications channel by said first network user from being propagated to said second network user as a function of both received identifying signals, while permitting the propagation of all other voice channel audio signals subsequently transmitted along said communication channel from said first network user to said second network user.

A method for selectively controlling the propagation of dual-tone multi-frequency signals along a communications channel within a telecommunication network, comprising the steps of:

• receiving, via said telecommunication network, during a pre-answer period of a call initiated from a first network user to a second network user supported by the communications channel, an identifying signal associated with said first network user;
• receiving, via said telecommunication network, during a pre-answer period of a call initiated from a first network user to a second network user supported by the communications channel, an identifying signal associated with said second network user;
• and
• prohibiting all dual-tone multi-frequency signals subsequently transmitted along said communications channel by said second network user from being propagated to said first network user as a function of both received identifying signals, while permitting the propagation of all other voice channel audio signals subsequently transmitted along said communication channel from said second network user to said first network user.