A subscriber's entrance to the telecommunications network. A logical view of this point of access has a relationship with the termination point as defined in the generic network model (GNM. ) In practice, this may be physically represented by a line card connected to the subscriber's access loop. For mobile communication services, where channels are assigned dynamically as the user moves, the point of access is considered to be at the service provider's location. In this case, there is one point of access for each channel and users who are moving use a sequence of different points of access (each one connected to a particular channel. )