Switched telephone network and method for managing a subscriber line in such a network

A method for managing a subscriber line in a switched telephone network, which network comprises:

• a first switch connected to a first subscriber line suitable for connection to a first landline telephone installed in a premise of a first subscriber, said first subscriber line being associated with a telephone number assigned to said first telephone, and
• a second switch comprising a database, storing a telephone number assigned to a second landline telephone of a second subscriber,
• the method further comprising:
• connecting a removable housing to the first subscriber line, in the premises where the first telephone is installed,
• connecting the second telephone to the housing,
• transmitting to the first switch a presence request containing the telephone number assigned to the second telephone, and
• the reception of the presence request by the first switch results in the automatic implementation of a logical computer process involving the second switch and resulting in the sharing of the first subscriber line, through the housing, between the telephone number assigned to the first telephone and the telephone number assigned to the second telephone.