Lenovo IBM modem 128Kbit/s modem

INTERNATIONAL ISDN PC CARD PC T20 A20M 120P I1200 I14X9 NS (PC) The IBM International ISDN PC Card is a credit-card-sized passive PC card with an S/T interface that connects to the ISDN basic rate interface. The kit features a full-function ISDN adapter, instructions, and software. The controller is integrated in the PC automatically, thus eliminating the need to configure interrupts or the I/O address. Its thin format and low power consumption make it convenient to use in laptop and notebook computers.