Gestetner G056, Service Manual

Page: 254 / 335

USB
G073/G074 6-2 SM
6.2 USB
6.2.1 SPECIFICATIONS
This model is equipped with standard USB.
Interface: USB 1.1, USB 2.0
Data rates: 480 Mbps (high speed), 12 Mbps (full speed), 1.5 Mbps (low speed)
High speed mode is only supported by USB 2.0.
6.2.2 USB 1.1/2.0
USB (Universal Serial Bus) offers simple connectivity for computers, printers,
keyboards, and other peripherals. In a USB environment, terminators, device IDs
(like SCSI), and DIP switch settings are not necessary.
USB 1.1 contains the following features:
•
Plug & Play
•
Hot swapping (cables can be connected and disconnected while the
computer and other devices are switched on)
•
No terminator or device ID required
•
Data rates of 12 Mbps (full speed), and 1.5 Mbps (low speed)
•
Common connectors for different devices
USB 2.0 is an evolution of the USB 1.1 specification. It uses the same cables,
connectors, and software interfaces so the user will see no change.
It provides an easy-to-use connection to a wide range of products with a maximum
data rate of 480 Mbps (high speed).
Up to 127 devices can be connected and 6 cascade connections are allowed.
Power is supplied from the computer and the maximum cable length is 5 m.