Featured Products by Lucent Technologies
Stinger DSL Access Concentrator
The New ATM-Based DSL Access
Concentrator
for the Next-Generation
Public Network
Continuing advances in DSL and ATM technologies give today's carriers and service providers unprecedented revenue-generating opportunities and potential for growth. By transforming ordinary twisted-pair telephone wires into high-speed data connections, DSL gives customers fast access and enables carriers and SPs to offer a wealth of new services based on packetized video, voice and data. At the same time, ATM technology is cutting expenses and boosting performance by revolutionizing the way data is passed through the core backbone networks. The performance and integrity of the DSLAM concentrator between customer DSL lines at the edge and ATM switches at the core is therefore crucial.
Stinger™ is a new breed of DSL access concentrator designed from the inside out to fulfill this critical role. Its future-proof busless architecture avoids the scalability and throughput restrictions imposed by proprietary bus designs. The use of ATM for internal communications further uncomplicates dataflow. Extensive modularity makes Stinger extremely easy to expand and upgrade and allows for redundancy. It also enables the system intelligence itself to be upgraded to reflect the current state of the art. The result is the most expandable, scalable and robust DSL access concentrator ever created.
Stinger Overview
Designed for tomorrow's networks and traffic
Stinger is a new carrier-class DSL access concentrator designed for forward-looking carriers and service providers. It offers all of the benefits ATM brings to multiservice networks, including lower installation, operation, and maintenance costs, effective bandwidth management, and high availability.
Addressing the needs of carriers implementing cell-based backbone networks, Stinger features the high-capacity traffic aggregation capabilities and robust "always on" performance expected of a true carrier- class product. It is also extremely easy to provision, manage, expand and upgrade. Part of a complete switched networking solution extending from end-user to end-user through the core, Stinger delivers faster throughput and lower cost per port than any competing product.
Unprecedented connectivity and capacity
Stinger supports ATM and Frame Relay communication protocols and all of the most common DSL access technologies. This makes it ideal for aggregating numerous connections originating from CellPipe and DSLPipe routers and similar customer premises equipment (CPE).
A single Stinger unit supports as many as 672 xDSL ports and four OC-3 trunk interfaces. Because three Stinger units can be housed in a standard telco rack, over 2000 DSL ports can be accommodated in just 7 feet of vertical space. This gives Stinger the highest port density of any DSL access concentrator on the market.
In recognition of the statistical nature of data traffic, Stinger uses internal high-speed ATM switching instead of multiplexing for traffic aggregation. This makes the flow of internal traffic more efficient because no bandwidth is wasted on ports with intermittent or no data on them. Stinger also supports as many as 8 virtual connections (PVCs or SVCs) per subscriber and buffers over 150 cells per connection. This helps keep bursty traffic flowing quickly and smoothly throughout the entire network.
A perfect interface for ATM backbone networks
Stinger is fully compatible with popular core switches, such as the CBX 500 and GX 550. It is the ideal high-speed central office DSL access multiplexor (DSLAM) for ingress to the main switch core, but is just as suitable for trunk-to-trunk switching.
Like the CBX 500 and GX 550 ATM switches, Stinger provides usage parameter control (policing), congestion control, bandwidth management and quality of service (QoS) guarantees. By ensuring traffic flow that is consistently fast and smooth, Stinger allows carriers to offer - and easily fulfill - customer Service Level Agreements (SLAs).
Engineered to keep networks up and running
The redundant modular architecture Stinger employs is designed for the rapid detection, diagnosis and mitigation of line and equipment problems. In the event of a module or port failure, Stinger can automatically raise an alarm and bring a backup online. The defective module or port is automatically taken offline and the affected module can then be hot-swapped at the network manager's convenience.
To ensure line integrity, network managers can locally or remotely command an optional test module in the Stinger chassis to perform various copper loop tests.
Line protection features within the Stinger modules help to keep mishaps at bay by isolating the modules from outside forces such as foreign voltages and current surges. Other features that help keep the network up and running include redundant trunk interfaces, a distributed power system, and a heat sensing fan assembly that automatically adjusts airflow to maintain an even internal temperature.
Major features
- DSL Concentration based on ATM Standards
- Highest port density available
- Future-proof busless architecture
- Layer-2 switched aggregation scheme
- Line-to-trunk, trunk-to-trunk and line-to-line switching
- High availability through redundant logic
- Hot-swappable modules
- Scalable to thousands of ports
- Line test and management features
- Multiple DSL types supported
- Traffic policing, queuing, shaping and congestion control
- Cell or Frame Relay (subscriber side)
- Navis network management
- Integrated copper loop test feature
- NEBS level-3 compliant
Applications
Carrier Networks
Today's leading carriers and the leading carriers of tomorrow rely on infrastructures that can smoothly integrate legacy networks with new network topologies. An excellent example of this trend is the way DSL technology enables high-speed ATM and Frame Relay transmissions to reach ATM backbone networks through existing telephone lines. Carriers who build their ATM backbones on GX550, CBX50 and BSTDX core switch products and use Stinger as their Access Layer DSLAM are assured of the highest performance ATM has to offer.
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Stinger is part of a total solution that spans all network layers. The GX and CBX product families create the core backbone, while DSLAM products such as Stinger, the DSLTNT and DSLMAX 20 provide access to the core. Customer sites employ the CellPipe and DSLPipe routers for ATM and FR access respectively. |
Integrated voice and data solutions
An inherent capability of ADSL line encoding is that a single analog voice channel may be carried along with digital data, over the copper loop between a customer premises and a central office (CO). While this provides a useful transport service for the voice traffic, it does not achieve optimal use of the copper loop. By digitally encoding voice traffic instead of carrying it in analog form, multiple voice channels can be carried with data over the same loop. New "integrated access devices" (IADs) are now becoming available that make this possible, allowing both in-band voice and data to be carried across an entire ATM network. In the example shown here, the IAD initiates two ATM virtual channels-one for data and one for voice. Both PVCs are switched through Stinger, and into the ATM network. The single voice PVC carries the traffic from up to 16 analog POTS inputs, terminating at the carrier's CA in an interworking facility (IWF). The IWF forwards the traffic to a class 5 switch using GR.303 protocol, for access to the PSTN. The data PVC initiated by the IAD carries traffic to an ISP or other specified destination.
DSL voice and data over ATM
Because Stinger supports full quality of service (QoS) according to the ATM Forum Traffic Management Specification (V4.0), it participates in the network's ability to deliver toll-quality digitized voice from end-to-end across an ATM network.
Scalability
 The most scalable DSL access concentrator ever designed, Stinger can be populated with line interface modules as needed to provide access to growing numbers of users. Modules supporting different xDSL technologies can be intermixed in a single Stinger unit, or multiple units can be dedicated to each specific type of xDSL. Fully populated Stinger units can then be linked in a daisy chain or star topology for aggregated operation. |
Stinger Hardware Architecture
Modular Architecture delivers high performance and scalability
A forced-air-cooled chassis with a revolutionary mid-plane design houses a variety of easily removable, yet tightly integrated modules to give Stinger extremely high port density and scalability. Stinger derives its high performance, unparalleled port density, extreme scalability and versatility from these four basic types of modules:
- Switching and Control Module (CM)- The CM provides the high-speed switching fabric at the heart of Stinger, as well as support for quality of service (QoS) and system control functions such as initialization, virtual connection establishment, configuration and management.
- Line Interface Module (LIM) - Diverse LIMs are available for Stinger, each type supporting a different DSL line code, with 12 - 48 ports per LIM type. In addition to providing aggregation of virtual channels for transfer to the Control Module's switching fabric, each LIM also participates in implementing quality of service functions and the system control functions described above.
- Trunk Module (TM) - Both OC-3 and DS-3 Trunk Modules are available for Stinger, with 2 ports per module. Trunk ports can be assigned for independent use, or redundant operation
- Line Protection Module (LPM) - Four models of Line Protection Module provide the line connectivity to Stinger. Two of these models offer support for 1:n LIM redundancy, while the other two models do not. In both cases, either 24-port or 48-port versions are available.
Stinger also features optional modules that perform special functions:
- Interface Redundancy Module (IRM) - This module furnishes the redundancy path to a spare Line Interface Module (LIM), when used in a stinger support-ing a single type of DSL.
- Copper Loop Test (CLT) - Module Two models of the CLT module are available that enable loop test and qualification of any line attached to Stinger. The first model provides access for an externally attached test set, while the second includes an integrated line testing capability. Both models can be remotely controlled via Navis, eliminating the need for a technician's presence at the Central Office each time one or more lines are to be put into service or tested for error conditions.
Stinger chassis and modules
Stinger is NEBS Level-3 compliant and meets the rigorous electrical, mechanical and environmental standards required by exchange carriers. Triple temperature-sensitive fans housed at the top of the unit provide cooling. Dual redundant -48 VDC line filters and a major/minor alarm module are housed in the base. Stinger's midplane design houses line Interface and control modules in the front of the chassis, while line protection and trunk modules are inserted in the rear.
Network Management
Comprehensive configuration, provisioning and monitoring via Lucent's NavisAccess
The powerful and versatile NavisAccess network management system provides full SNMP-based operational control of Stinger. In its initial support for Stinger, NavisAccess offers a user-friendly GUI and "wizards" that make configuration a breeze. In a later release, NavisAccess, working in conjunction with the NavisXtend provisioning server, will offer full end-to-end virtual channel provisioning across an entire Lucent ATM network. No more laborious configuration of separate network nodes and links - instead, simply point-and-click on the termination points of the desired PVC, and NavisAccess will allow you to build the entire circuit in a single step.
QoS fulfillment
To be competitive in today's networking environment, service providers must support a complete mix of voice, video and data over a single network, all with differing service level requirements. NavisAccess allows you to take advantage of Stinger's advanced QoS capabilities, making it possible to offer end-users a diverse range of Service Level Agreements (SLAs). Diverse SLAs mean diverse service offerings such as telephony, video-on-demand, broadcast entertainment, as well as less demanding data transport and Internet access services and corresponding new sources of revenue.
Interoperability
"Wired for DSL" is a Lucent partnership program dedicated to ensuring multi-vendor DSL interoperability. Under this program, leading CPE and voice-over-DSL (VoDSL) vendors are able to have their systems certified as interoperable with Lucent's industry leading DSL products. Systems are put through comprehensive testing, and are verified for interoperability with the Stinger and/or the DSLTNT, DSLMAX 20 and Terminator. The "Wired for DSL" program provides customers with more choices and greater design flexibility, while simultaneously enabling them to build more reliable DSL networks.
NavisAccess: DSL Graphical User Interface
Specifications
| Electrical Specifications Power requirements: -48 VDC @ 1,100 Watts max Inrush: All modules have inrush limiting circuits. Power cord and connectors: 10 gauge power cord, #10 lug nuts DC power source fuse 35-40A Module Power Consumption Redundant control module: 37.4 W 12 - port ADSL LIM: 62.4 W 48 - port SDSL LIM operating at: OC-3 trunk module: 11.5 W DS-3 trunk module: 11.5 W |
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Physical Specifications Overall chassis size: 24.5 in. (62.23 cm) high (14U) x 17.3 in. (43.94 cm) wide x 16.5 in. (41.91 cm) deep Unit Weight: 160 lb. max (fully configured ) Card slots - front: Card slots - rear: Max line port capacity: 672 Max trunk port capacity: 4 Line interfaces: 50-pin RJ-21X, 24 ports with 2 wires per port Trunk interfaces: |
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Operating Environment Ambient operating temp: 0 C to +55 C Relative humidity: 10% to 95% (non-condensing) Operating altitude: to 10,000 ft. (3,050 m) Ambient storage temp: -40 C to +65 C, 95% relative humidity Storage altitude: -1,000 to +30,000 ft. (-305 to +9,150 m) Protocol Specifications |
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