A communication device for use in connecting a mobile station to a terminal includes a first group of frame memories that correspond to radio links used to transmit data to the mobile station. The first group of frame memories is configured to store point-to-point (PPP) frames. The communication device...http://www.google.ca/patents/US7177289?utm_source=gb-gplus-sharePatent US7177289 - Facilitating communications between a radio device and a terminal
