CyberData 10807 Manual De Usuario

 

Installing and Using the 4-Port PoweredUSB Hub

Operation

Operations Guide

930103E

CyberData Corporation

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2.5 Operation

The SiP VoIP and PoE Speaker is a standard USB Hub that complies with the USB 2.0 specification, 
and adds PoweredUSB ports. When connected to a Host, it is enumerated as a Generic USB Hub. This 
Hub also meets the PoweredUSB .08g specification. For more information about this specification, 
go to www.poweredusb.org.

2.5.1 POS Peripheral Caveat

According to the USB 2.0 specification, devices attached to a USB interface should enumerate from 
the Hub’s USB Vbus, regardless of the PoweredUSB powered ports. Some POS devices do not 
comply with this specification, and will not enumerate unless the upper sections of the PoweredUSB 
ports are active.

When running on operating systems such as Windows XP with no devices attached (an empty Hub), 
the operating system turns the Hub off. The operating system does not detect non-compliant 
peripherals when they are hot-plugged into an empty Hub. Consequently PoweredUSB power is 
not supplied to the peripheral. In this case, you can restore correct operation as follows. 

1. Unplug the Host side connection for five seconds, and then plug it in again. 

2. Be sure that at least one USB device is plugged in when the computer is booted, or leaves 

standby mode.

3. Plug in a standard USB compliant device, such as a mouse or keyboard.

4. Disable the low-power, standby operation. With this configuration, power is always supplied to 

the PoweredUSB ports regardless of the PC’s operational state. For more information, contact 
CyberData as instructed in