Initiating a conference call using a call waiting graphical user interface includes receiving an indication that an incoming telephone call is directed to a telephone number and identifying an account associated with the telephone number to which the incoming call is directed. Configuration data related to the account is accessed. A first online identity and a second online identity associated with the account are identified based on the configuration data accessed. A first electronic communication is sent to the first online identity and a second electronic communication is sent to the second online identity. The first online identity can respond to the first electronic communication and the second online identity can respond to the second electronic communication. A conference call between the caller and the first and second online identities is initiated conditioned on whether the responses by the first and second online identities indicate that both the first and second online identities wish to take the call.