Abstract: A modem assembly for a computer is disclosed that includes a cavity that receives a PCMCIA Modem Card which is displaced a distance x within the interior of the computer housing. The PCMCIA Modem Card includes a standardized PCMCIA Modem input/output connector. The modem assembly includes a connector block that comprises a body potion and an end cap. The body potion of the connector block includes one or more telephone sockets that are mounted flush to the exterior surface of the computer enclosure. The end cap protrudes downwardly and outwardly from the body potion, with a thickness x and a width and height approximately equal to the cross-sectional height and width of the PCMCIA Modem Card, to mount flat with the computer enclosure and to seal the PCMCIA Modem Card within the computer enclosure. The end cap includes an electrical socket that mates physically and electrically with the standardized PCMCIA input/output connector.