Cisco offers a wide variety of connectivity, expansion and upgrade options to accommodate the range of application needs in customer networks. The network modules assure customers that they can choose a connectivity solution that fits their requirements. They are easily and inexpensively upgradeable as customer requirements change.These are AIP ATM full duplex interfaces. The AIP provides an interface to ATM switching fabrics for transmitting and receiving data at rates of up to 155 Mbps bi-directionally; the actual rate is determined by the Physical layer interface module. This module provides speed at DS3 45 Mbps.