Hi,
for flashing S-Gold phones the following cables is used:
-data serial cable Sie C55 (flash/unlock E-Gold and S-Gold phones)
-data serial cable DCA500 (flash/unlock/data transfer E-Gold and most S-Gold phones)
-serial to USB cable DCA510. Without modification is used on E-Gold phones (flash/unlock/data transfer) and with modification (two 10Kohms resistors) is used on S-Gold phones (flash/unlock/data transfer).
USB native cable DCA540 is used on S-Gold phones only for data transfer, not for flash or unlock...
For schematic diagram go to http://rapidshare.com/files/44149250/Service_cable.rar
dagos