It appears that the SANYO SCP-4900 needs similar quirks to the

Metricom Ricochet GS modem.  Add them here.

# A new umodem appears to be needed to make the sanyo phone work, but that's
# more extensive and will come after coordination.

sys/dev/usb/usb_quirks.c

@@ -75,6 +75,8 @@ Static const struct usbd_quirk_entry {
  { USB_VENDOR_MCT, USB_PRODUCT_MCT_USB232,          0x102, { UQ_BUS_POWERED }},
  { USB_VENDOR_METRICOM, USB_PRODUCT_METRICOM_RICOCHET_GS,
  	0x100, { UQ_ASSUME_CM_OVER_DATA | UQ_NO_STRINGS }},
+ { USB_VENDOR_SANYO, USB_PRODUCT_SANYO_SCP4900,
+ 	0x000, { UQ_ASSUME_CM_OVER_DATA | UQ_NO_STRINGS }},
  { USB_VENDOR_TI, USB_PRODUCT_TI_UTUSB41,	    0x110, { UQ_POWER_CLAIM }},
  { USB_VENDOR_ACERP, USB_PRODUCT_ACERP_ACERSCAN_320U,
 						    0x000, { UQ_NO_STRINGS }},