T8207-BAL-DT Agere Systems, Inc., T8207-BAL-DT Datasheet - Page 10

• Manufacturer Part Number: T8207-BAL-DT
• Description: CelXpres ATM interconnect. Dry-bagget, tape & reel .
• Manufacturer: Agere Systems, Inc.

CelXpres T8207
ATM Interconnect
1
Figure 2 illustrates the use of the CelXpres T8207 in a system with dual backplane cell buses using shared
UTOPIA mode. In this configuration, both T8207 devices on each card receive cells from the UTOPIA bus, and
each device uses its translation table to determine if the cell should be transmitted on its backplane cell bus. In the
egress direction, each T8207 device receives cells from its cell bus to transmit on the UTOPIA bus. MPHY arbitra-
tion and queue priorities are resolved using a two-wire interface between the two devices. Although a single ATM
virtual connection is not typically established on both backplane cell buses simultaneously, no restrictions exist for
a single PHY utilizing both backplane cell buses for different virtual connections supporting higher throughput from
two bus interfaces. Redundant bus configurations can be supported in the event of a bus failure with T8207
devices by configuring one device to assume bus responsibility from the other.
10
Product Overview
BACKPLANE
DOWNSTREAM
DOWNSTREAM
BUFFERING
BUFFERING
BUS
(continued)
T8207
T8207
TRANSLATION
TRANSLATION
UPSTREAM
UPSTREAM
Figure 2. Dual Bus Implementation
UTOPIA
DOWNSTREAM
DOWNSTREAM
BUFFERING
BUFFERING
UTOPIA
PHYs
T8207
T8207
TRANSLATION
TRANSLATION
UPSTREAM
UPSTREAM
UTOPIA
UTOPIA
PHYs
Advance Data Sheet
September 2001
Agere Systems Inc.
0041