Here's the pinout configuration of theSamsung Galaxy Tab from left to right solder pins of the dock connector.
Image courtesy of Droidangel.com
This is the technical info of Samsung Galaxy Tab Pinouts for digital and analog I/O on the 30 pin dock connector.
1 Gnd P
2 Gnd P
3 USB_DP_CON I/O
4 USB_DM_CON I/O
5 IF_CON_SENSE I
6 V_ACCESSORY_5.0V P
7 V_BUS_1 P
8 V_BUS_1 P
9 VOUT_CHARGER P
10 VOUT_CHARGER P
11 no connection
12 no connection
13 ACCESSORY_ID / USB_ID I
14 ACCESSORY_INT I
15 Gnd P
16 Gnd P
17 MHL_DP I/O
18 MHL_DM I/O
19 MHL_ID I
20 IF_RXD I
21 IF_TXD O
22 no connection?
23 AP_TV_OUT O
24 REMOTE_SENSE I
25 no connection
26 no connection
27 EAR_L_CRADLE O
28 EAR_R_CRADLE O
29 3.5_INT_TEST I
30 Gnd P
