Skype Limited

Teet Konnussaar

Liz Rice

Tauri Tuubel

Stuart John

Jill Tolan

Ahti Heinla

Indrek Mandre

Lauri Tepandi

A method of determining an overall presence state for a user of a communication system in which the user is connected to the communication system using a plurality of devices. The method includes each of the plurality of devices storing in a device memory a presence state for that device; detecting a change in the presence state in at least one of the plurality of devices; each of the plurality of devices transmitting a message via the communication system to the remainder of the plurality of devices, the message comprising the presence state; receiving the messages at the remainder of the plurality of devices; and executing a decision-making code sequence in a processor at each of the remainder of the plurality of devices to determine whether to synchronize the presence state of that device with the presence state from one of the messages based on the origin of an event causing the change in presence state at the at least one of the plurality of devices.

Detection of communication states

A method of determining an overall presence state for a user of a communication system in which the user is connected to the communication system using a plurality of devices. The method includes each of the plurality of devices storing in a device memory a presence state for that device; detecting a change in the presence state in at least one of the plurality of devices; each of the plurality of devices transmitting a message via the communication system to the remainder of the plurality of devices, the message comprising the presence state; receiving the messages at the remainder of the plurality of devices; and executing a decision-making code sequence in a processor at each of the remainder of the plurality of devices to determine whether to synchronise the presence state of that device with the presence state from one of the messages based on the origin of an event causing the change in presence state at the at least one of the plurality of devices.

A method of synchronizing the contact information of a group of users of a telephony system between the group of users over a communications network is provided. Each user of the group of users has a user terminal connected to the communications network and executes a client, the client comprising a contact information list. A first user belonging to the group of users selects the contact information of other users in the group from the contact information list and chooses to synchronize the contact information. An invitation message is transmitted from the client executed on the user terminal of the first user to the client executed on the user terminal of each of the other users in the group, the invitation message including an invitee list of users belonging to the group. The invitation message is received at the client of each of the other users in the group. At least one of the other users in the group accepts the invitation message, the step of accepting comprising generating an acceptance message, the acceptance message giving authorization to the group of users to contact the at least one other user, broadcasting the acceptance message to the group of users and adding the invitee list to the contact information list of the at least one user.

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Tallinn, Estonia

Teet Konnussaar