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Apparatus and method to determine dialing prefixes for call origination to a telephone number

  • US 7,343,154 B2
  • Filed: 12/19/2000
  • Issued: 03/11/2008
  • Est. Priority Date: 12/19/2000
  • Status: Expired due to Fees
First Claim
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1. In a communication device operable in at least two states, a method of transitioning a call from a first state to a second state, each state having an associated number, each number having a prefix portion and a suffix portion, the call being associated with at least one called device and a calling device, the method comprising:

  • requesting a change of state;

    sending at least the suffix portion of the number corresponding to the second state to the calling device;

    comparing the number corresponding to the first state with the number corresponding to the second state;

    appending the prefix portion of the number corresponding to the first state with the suffix portion of the number corresponding to the second state;

    establishing a new connection between the called device and the calling device using the number corresponding to the second state; and

    transitioning the call, based on the new connection, from the first state to the second state, wherein transitioning further comprises transitioning between a clear state and a secure state.

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