HC25 AT Command Set - Portech.com.tw

HC25 AT Command Set
2.13 AT^SUSB
s
Note
• When changing the USB enumeration parameters take care to choose the right configuration depending on
the type of USB drivers used. Keep in mind that "Mdm" makes the ME inaccessible with the Windows XP and
Windows Vista USB drivers supplied by Siemens.
If alternate usage with different USB drivers is necessary during application development, take care not to
change all three enumeration parameters , and for only one specific driver setup.
In particular, we strongly recommend to configure and for different USB enumeration
modes. This gives you the flexibility to easily revert to the enumeration mode needed when you connect the
ME to a USB host based on another driver setup. For example, if equals "Mdm" select "MdmNet"
for or vice versa.
Also, do not set = "0" because the timeout enables the ME to enumerate as mass storage if the drivers
required by the currently selected enumeration mode are not found. Depending on whether drivers are
installed you can then decide how to proceed: installing the USB drivers if required, or, if the drivers are
already installed, ejecting the mass storage to revert to the composite device enumeration needed.
Of course, if you do not wish to operate the ME with different drivers the "MdmNet" and "Mdm" enumeration
modes should not be different for and .
HC25_ATC_V01.200 Page 49 of 290 7/25/07
Confidential / Released