T1000 Modem Slot 27-pin connector

Pin     Input/Output  Signal
 1                     Ground
 2            O        MDMSL0
 3            O        RESET1
 4                     VCC
 5                     VCC
 6            O        IORD0
 7            O        IOWR0
 8                     GROUND
 9            I        MDSPK0
10            I        IRQ30
11           I/O       SD71
12           I/O       SD61
13           I/O       SD51
14           I/O       SD41
15                     GROUND
16           I/O       SD31
17           I/O       SD21
18           I/O       SD11
19           I/O       SD01
20            O        A01
21            O        A11
22                     GROUND
23            O        A21
24            I        MDMSW0
25            O        P9VDC
26            O        M9VDC
27                     NOT CONNECTED