txc-05806 TranSwitch Corporation, txc-05806 Datasheet - Page 2

• Manufacturer Part Number: txc-05806
• Description: Aspen Express
• Manufacturer: TranSwitch Corporation

ASPEN Express
High-performance ATM Switch
Historical-based success.
Based on TranSwitch’s field-proven CellBus technology, the
ASPEN Express is a high-performance ATM switch that interfaces
directly with UTOPIA level 1/2 (8/16-bit) compliant devices. It provides
exceptional support for high-density switching of up to 64 PHY
ports with maximum total throughput rates of up to 622 Mb/s. The
ASPEN Express efficiently incorporates all functions necessary for
ATM cell transfer at OC-12 rates including cell address translation,
cell routing and outlet cell queuing. Outstanding traffic management
capabilities such as policing, and eight levels of prioritized service
support for unicast and multicast cell transfers ensures ultra reliable
high bandwidth switching. The ASPEN Express supports a
multitude of system configurations based on TranSwitch’s patented
CellBus switch fabric technology including multiplexing and
switching systems. In all, ASPEN Express offers the ultimate
in high-performance and increased throughput in a flexible cost-
effective package.
Line Side
Interface
UTOPIA
Outlet
Inlet
Port
Cell
Port
Cell
FIFO
FIFO
Interface
SDRAM
SDRAM
Translation
Outlet Queue
SDRAM
Control
OAM
Microprocessor
Interface
Interface
Host
Multicast
Interface compatibility creating design flexibility.
A UTOPIA level 1/2 port is the main interface for cell traffic
between the ASPEN Express and other PHY layer devices on the
line side. This ATM Forum compatible interface can address up to
64 physical devices in ATM layer emulation mode. In addition, the
ASPEN Express supports cell sizes from 53 bytes to 57 bytes in
8-bit interface mode and 54 to 58 bytes in 16-bit interface mode
while flexibly supporting both master and slave modes of operation.
On the switch side, the ASPEN Express interfaces with a dual
CellBus, TranSwitch’s widely deployed switch fabric technology.
CellBus provides synchronous bus operation with a central bus
arbiter that manages access transmissions with a defined 16-cycle
frame structure. Since communication between any of the devices
on the bus is possible, any cell distributed onto the bus by an
ASPEN Express device can be unicast, broadcast or multicast
addressed to its destination. This inherent flexibility allows for the
development of system designs that meet your unique requirements.
Queue
Inlet
Interface
CellBus
Arbiter
Bus
CellBus B
CellBus A
Switch Side