The fundamental idea in the invention is as follows. Instead of setting up and releasing a bearer, e.g. an AAL2 connection, the connection is maintained and only modified to have either a zero bandwidth or the required bandwidth. The zero bandwidth corresponds to a release in the conventional case and the required bandwidth corresponds to the setup of the connection. The invention is especially applicable in the cases where it is reasonable to assume that a connection once established and currently/no longer needed, that usually can be an AAL2 connection, will be needed again after a reasonably short period of time. However, the invention is applicable also in the general case where the AAL2 connections are initially set up with zero or small resources and then modified afterwards to an appropriate bandwidth on demand.