| 摘要 |
A method of establishing a conference call in a communication network between a plurality of user terminals each having an identifier. The method comprising receiving a first list of identifiers corresponding to the user terminals with whom the conference call is to be established. At least one of the identifiers represents a second list comprising a plurality of other user terminals each having their own other identifiers. The conference call is established with the user terminals in the first list and the other user terminals represented by the at least one identifier in the first list.
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