1. A computer-implemented method for restricting access to a telephone call management system, said method comprising the steps of: during a registration process by a user of said telephone call management system: prompting the user to speak one or more predetermined keywords; receiving a first speech sample from said user; verifying said first speech sample is indicative of said one or more predetermined keywords using speaker independent voice recognition; and associating said verified first speech sample with said user and storing said verified first speech sample in a database; and during each subsequent access attempt by said user to said telephone call management system to place a telephone: prompting said user for a second speech sample; determining whether a voice characteristic of said second speech sample matches a voice characteristic of said verified first speech sample; allowing said telephone call to be completed when the voice characteristic of said second speech sample matches the voice characteristic of said verified first speech sample; and after the allowing said telephone call to be completed, sampling voice data from said telephone call to detect if an unauthorized person has spoken based on the voice characteristic of the verified first speech sample.
1. A computer-implemented method for restricting access to a telephone call management system, said method comprising the steps of: during a registration process by a user of said telephone call management system: prompting the user to speak one or more predetermined keywords; receiving a first speech sample from said user; verifying said first speech sample is indicative of said one or more predetermined keywords using speaker independent voice recognition; and associating said verified first speech sample with said user and storing said verified first speech sample in a database; and during each subsequent access attempt by said user to said telephone call management system to place a telephone: prompting said user for a second speech sample; determining whether a voice characteristic of said second speech sample matches a voice characteristic of said verified first speech sample; allowing said telephone call to be completed when the voice characteristic of said second speech sample matches the voice characteristic of said verified first speech sample; and after the allowing said telephone call to be completed, sampling voice data from said telephone call to detect if an unauthorized person has spoken based on the voice characteristic of the verified first speech sample. 8. A method according to claim 1 , wherein said one or more predetermined keywords include said user's name.