Patent ID: 7343154
Filing Date: 2008-03-11
Classification: H04M

Abstract:
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.