PCB versions
There are 2 different PCB's used for the model FMSFT56i
Rockwell HCF Chipset
There are 2 different main chips used for the model FMSFT56i
Only one chip is used on the model using the PCB FM-5687.
Two chips are used on the model using the PCB FM-5668.
Jumper Blocks
The newer models have a jumper block with the following functions:
- JP1
- REG - use the on board 3.3V regulator (factory default), compatible with all motherboard.
- VAUX - used only for the motherboard that supplies the VAUX power in the PCI slot.
- PCI - for those motherboard supply 3.3V in the PCI slot.
- Case I: If the motherboard support 5V only in the PCI slot.
- The jumper must be set to REG (default).
- Case II: If the motherboard support both 5V and 3.3V but not Vaux.
- The jumper can be set to REG or PCI. In both case, it won't make any difference.
- Case III: If the motherboard support 5V, 3.3V and Vaux.
- The jumper can be set to VAUX. In this case, the modem will support D3 cold power management mode.
- The modem will also be functional if the jumper is set to REG / PCI
- position. However, the modem will not support D3 cold operation.
- Since nowadays, few motherboard support the Vaux and the complete power management operation, JP1 should be set to REG.
There are no jumpers on this PnP model. The Com Port/IRQ is PnP software selectable.