BXM-T3/E3 Br
oadband Switch Module
D
ATA
S
HEET
BXM-T3/E3 Broadband Switch Module
T
H E
B X M - T 3 / E 3
I S A H I G H
-
D E N S I T Y
AT M T 3 / E 3
I N T E R F A C E C A R D T H A T U S E S C U S T O M
APPLICATION
-
SPECIFIC INTEGRATED CIRCUIT
(ASIC)
TECHNOLOGY
,
FOR THE
BPX 8600 S
ERIES
,
TO DELIVER
THE INDUSTRY
’
S MOST ADVANCED AND RELIABLE
ATM
NETWORKING FEATURES
. I
T
S
UPPORTS
PVC
S
, SVC
S
,
S-PVC
S AND
MPLS LVC
S
(
LABEL
VC)
AND PROVIDES CARD REDUNDANCY PROTECTION
. I
TS HIGH
-
SPEED
CONNECTIVITY TAKES
ATM
TO NEW LEVELS OF EFFICIENCY AND SCALABILITY
.
T
HE ENHANCED MODELS OF THE
BXM-T3/E3
ALSO DELIVER THE MOST ADVANCED ATM SWITCHING AND
TRAFFIC MANAGEMENT CAPABILITIES IN THE INDUSTRY
. T
HESE MODELS EXTEND SCALABILITY BY DOUBLING
THE CONNECTION DENSITY AND CELL BUFFERS ON SELECTED MODELS AS WELL AS PROVIDE FUTURE SUPPORT
FOR VC MERGING FOR LARGE
MPLS-
BASED
IP+ATM
NETWORKS
.
Key Features
• High-scalability connection densities with up to 144 T3/E3
ATM ports on a single Cisco BPX
®
8600 series
wide-area switch
• Complete network control through dynamic resource sharing
and support for all ATM service classes
• Industry’s first fully compliant ATM Forum available bit rate
(ABR) virtual source/virtual destination (VS/VD) capability in
custom ASICs
• New level of ATM price/performance to optimize the network
life cycle
• Support for VC merging with future software upgrade allows
“label” sharing for different MPLS VCs with the same
destination and class of service (enhanced -E and -EX
models only)
With the increasing deployment of Asynchronous Transfer Mode
(ATM) networks, there is a growing need for an ATM network
platform that can deliver an unprecedented level of scalability,
performance, and functionality at lower costs. Such an ATM
switching platform must support high-speed interfaces with high
port densities as well as advanced ATM traffic management
capability.
Advanced ATM traffic management capabilities are
implemented in a family of custom ASICs that enable
high-density, high-speed ATM interface modules with advanced
features and functionality for the BPX 8600 and IGX
™
8400
series wide-area switches.
This ASIC technology cost-effectively delivers the most
advanced ATM switching and traffic management capability in
the industry. It represents the first commercially available
implementation of VS/VD.
The BXM-T3/E3 broadband switch module is a 8-, or 12-
port, Digital Signal level 3 (DS-3) (45 or 34 Mbps) ATM interface
card for the BPX switch platform. The interface can be configured
for trunk, public, or private User-Network Interface (UNI)
applications on a per-port basis to provide a high-density,
low-cost broadband ATM networking solution.
Technical Specifications
Physical Layer
• 8-, or 12-port T3/E3 ports
• Complies with ATM Forum UNI Specification Version 3.1, 4.0
• 1:1 BXM redundancy supported using ‘Y’ redundancy
• Interface Physical Characteristics:
Synchronization
• Can be configured for internal timing from the BPX internal
Stratum 3 clock conforming to ATT Pub. 62411
• System clock synchronization to service module port option
ATM Layer
• Configurable for trunk and public or private UNI application
Characteristic
T3 (DS3)
E3 (34 Mbps)
Line Rate
44.736 Mbps 20 ppm
34.368 Mbps 20ppm
Line Code
B3ZS
HDB3
Cell transfer rate
96,000 cells/sec
80,000 cells/sec
Framing
ANSI T1.107, T1.107a
ITU-T G.804, G.832
Signal Level
TA-TSY-00077 (PLCP)
ITU-T G.703
Connector
Locking SMB
Locking SMB
Cell Mapping
Direct
Direct
