Kramer KDS-USB2

Kramer Electronics Ltd.
SwitchableUSB – 3 Supported Messages
20
3.14 Use Filtering Strategy
Sent by a client to a device to tell the device that it should use a certain type of filtering
strategy contained within this message. The filtering strategy denotes which type of devices
will be filtered out by the extenders. An acknowledgement message will be sent back to the
client if the extender supports device class filtering, and a valid strategy was selected.
Otherwise, a NAK will be sent to the client.
3.14.1 Field Descriptions
Filtering Strategy
0: Allow all devices
1: Block all devices except HID and hub
2: Block mass storage devices
3: Block all devices except HID, hub, and smartcard
4: Block all devices except audio and vendor specific
Byte Offset
+-----------------------------------------+-----------------------------------------+
0 | Magic Number |
+ +
2 | |
+-----------------------------------------+-----------------------------------------+
4 | Message ID |
+ +
6 | |
+-----------------------------------------+-----------------------------------------+
8 | Protocol Version = 3 | Command = 9 |
+-----------------------------------------+-----------------------------------------+
10 | Filtering Strategy |
+-----------------------------------------+