A method for attaching a user terminal to a packet network via a meshed radiocommunications network infrastructure comprising: - a plurality of base stations (3, 5), each base station (3, 5) being capable of accomplishing radio transmission and reception with at least one user terminal located in at least a cell (4, 6) attached to said base station (3, 5); - a plurality of means for authenticating and monitoring (7, 8) user terminals; - a plurality of means (11, 12) for attachment to packet networks (11a, 11b, 11c, 12a, 12b, 12c); - a plurality of distribution gateways (9, 10), each distribution gateway (9, 10) being capable of connecting at least one of the base stations (3, 5) to at least attachment means (11, 12); - a database comprising access information pertaining to rights for attachment of user terminals to at least one packet network (11a, 11b, 11c, 12a, 12b, 12c); the user terminal having a unique user identification code comprising: - a first meshed network identifier code, and - a second meshed network user identification code, said second meshed network user identification code comprising: - an identification code of an organization of the meshed network, - an identification code of a service area of the meshed network, and - a user identification code within the service area of the meshed network and of said organization said method comprising the following steps in the meshed network infrastructure: - receiving a request of a first attachment of a user terminal to a packet network (11a, 11b, 11c, 12a, 12b, 12c), the request comprising the unique user identification code of the user terminal, - checking the access rights of said user terminal to said infrastructure based on said first meshed network identifier code in the base station attached to the cell comprising the user terminal, - authenticating the user of the user terminal based on the unique user identification code comprised in the database and in the user terminal; - selecting a host packet network dedicated to at least one category of users to which the user terminal belongs based on the second meshed network user identification code and/or to access information pertaining to rights for attachment of user terminals to at least one packet network; - selecting of means for attachment to said host packet network based on data pertaining to the topology of the meshed network infrastructure, - establishing an access channel between the means for attachment to the host packet network and a distribution gateway connected to the base station attached to the cell comprising the user terminal. - a plurality of base stations (3, 5), each base station (3, 5) being capable of accomplishing radio transmission and reception with at least one user terminal located in at least a cell (4, 6) attached to said base station (3, 5); - a plurality of means for authenticating and monitoring (7, 8) user terminals; - a plurality of means (11, 12) for attachment to packet networks (11a, 11b, 11c, 12a, 12b, 12c); - a plurality of distribution gateways (9, 10), each distribution gateway (9, 10) being capable of connecting at least one of the base stations (3, 5) to at least attachment means (11, 12); - a database comprising access information pertaining to rights for attachment of user terminals to at least one packet network (11a, 11b, 11c, 12a, 12b, 12c); - a first meshed network identifier code, and - a second meshed network user identification code, said second meshed network user identification code comprising: - an identification code of an organization of the meshed network, - an identification code of a service area of the meshed network, and - a user identification code within the service area of the meshed network and of said organization - an identification code of an organization of the meshed network, - an identification code of a service area of the meshed network, and - a user identification code within the service area of the meshed network and of said organization - receiving a request of a first attachment of a user terminal to a packet network (11a, 11b, 11c, 12a, 12b, 12c), the request comprising the unique user identification code of the user terminal, - checking the access rights of said user terminal to said infrastructure based on said first meshed network identifier code in the base station attached to the cell comprising the user terminal, - authenticating the user of the user terminal based on the unique user identification code comprised in the database and in the user terminal; - selecting a host packet network dedicated to at least one category of users to which the user terminal belongs based on the second meshed network user identification code and/or to access information pertaining to rights for attachment of user terminals to at least one packet network; - selecting of means for attachment to said host packet network based on data pertaining to the topology of the meshed network infrastructure, - establishing an access channel between the means for attachment to the host packet network and a distribution gateway connected to the base station attached to the cell comprising the user terminal.