Network resource reallocation in IUB

A method of assigning resources within a network element within which a traffic termination point or AAL2 termination point has been established is described. The network element accepts a connection request, and it is then ascertained whether available resources have sufficient capacity to establish the requested connection. In the event that there is sufficient capacity, it is ascertained whether the termination points defined in relation to the available resources fragments the resources such that the connection cannot be established. If the resources are so fragmented, then one or more of the termination points are reallocated, without breaking the connection to which they relate, thereby defragmenting the resources sufficiently that the requested connection can be established.