SG2117 Digital Subscriber Line Access Multiplexer (DSLAM)

Access Digital Subscriber Line Access Multiplexer (DSLAM)

Overview Key Benefits The digital subscriber line access ISPs in minimizing cost while maximizing > Supports transmission voice multiplexer (DSLAM) is a network element efficiency of their networks. Multiplexing and data over existing defined to support high-bandwidth access to technology, based on time division twisted-pair copper the public network. With the ability to multiplexing (TDM), or switch-based infrastructure using DSL support data and voice services over schemes like frame relay, IP, or ATM, transceivers existing subscriber lines, the DSLAM can reduces the number of physical connections > Separates voice from data, assist local phone service providers and to the backbone. routing them onto separate networks

DIGITAL SUBSCRIBER LINE ACCESS MULTIPLEXER BLOCK DIAGRAM > Internet access, remote work station LAN/WAN access, PowerQUICCTM frame relay, and native ATM PowerQUICC ª Integrated all supported with DSLAM Integrated Communications Communications Processor with SAR > Serves as a VPN gateway Processor with SAR PowerQUICCTM > Subscriber side of xDSL Integrated Communications solution considered a security ATM Cell Processor Processor with SAR gateway Routing Fabric SUBSCRIBERS CO Switch Queue Queue PHY or Data Mgmt./ Mgmt./ Carrier PHY Fabric Fabric Interface Interface

Trunking Card DSL Line Cards Freescale Ordering Information

Part Number Product Name Product Highlights Additional Information

MPC850 PowerQUICC Integrated > 80MHz maximum speed www.freescale.com/netcomm Communications Processor > 2K-bytes cache-L1 instructional > 1K-byte cache-L1 data > 8-entry translation look aside buffers MPC857T PowerQUICC Integrated > 80MHz maximum speed www.freescale.com/netcomm Communications Processor > 4K-bytes cache-L1 Instructional > 4K-bytes cache-L1 data > 59 parallel bits MPC860 PowerQUICC Integrated > 80MHz maximum speed www.freescale.com/netcomm Communications Processor > 4K-bytes cache-L1 instructional (DE, DT, EN, SR, and T) > 16K-byte cache-L1 instructional (DP and P) > 4K-byte cache-L1 data (DE, DT, EN, SR, and T) > 8K-byte cache-L1 data (DP and P) > 32-entry translation look aside buffers MPC862 PowerQUICC Integrated > Enhanced ATM functionality www.freescale.com/netcomm Communications Processor > New features available in “enhanced SAR” (ESAR) mode

Design Challenges interface. Additionally, they feature a > The Figure shown on page 1 The combination of interfaces and specially designed RISC illustrates the trunking card services present a difficult challenge to communications processor with connecting the DSLAM to the central DSLAM implementation, especially in integrated support for multiple protocols office ATM switch for data services light of time-to-market constraints. In the to manage serial communications and to the Public Switched Telephone asynchronous traffic mode (ATM)-based channels. All members of Freescale Network (PSTN) for voice services. DSLAM, the interface between the Semiconductor’s leading PowerQUICC II The PowerQUICC Integrated DSLAM and the network will be an family of integrated communications Communications Processor handles official carrier (OC) level-12 (OC-12), processors are easily upgraded through call setup, tear-down, and card OC-3, or DS3, compliant with the ATM download microcode packages. These management functions. If the control Forum's UNI specification. The DSLAM innovative microcode packages provide path requires a low-bit-rate should support statistical multiplexing, the ideal mix of control and data plane segmentation and reassembly (SAR) traffic management (TM), cell buffering, functionality, enabling our customers to function to support CO-to-DSLAM cell queuing, priority schemes, and reduce time-to-market by focusing on signaling or intra-DSLAM fairness algorithms in accordance with value-added product elements. communications, several the ATM Forum's TM specification. This architecture significantly enhances PowerQUICC family members Traditional approaches require separate system performance, security and integrate this important function to hardware and general purpose CPUs for efficiency, saving energy consumption, offer cost-effective, and highly each interface type and protocol, up to full rate OC-3 VPN (IPSec) support integrated solutions. resulting in many individual designs, through the use of a MPC185 Security > The DSL line card provides the along with limited reuse of software. In Processor. The MPC185 Security subscriber interface to the DSLAM. Its addition, designers face termination of Processor is easily integrated into anatomy is very similar to the trunking VPN (IPSec) tunnels. PowerQUICC II systems via the 60x bus. card, providing many of the same Freescale Semiconductor Solution The MPC185 achieves high features, so the PowerQUICC II family Freescale Semiconductor's performance through 60x bus mastering is also an ideal solution. For PowerQUICC™ Integrated and immediate access to system applications requiring less than full Communications Processors feature a memory. By avoiding data transfers rate, full duplex OC-3 performance, unique dual-processor architecture, a across bridges and secondary buses, PowerQUICC with multi-service core CPU compliant with the PowerPC the MPC185 provides PowerQUICC II platform (MSP) microcode allows instruction-set architecture that handles system designers with the ultimate most ATM switching functionality system tasks with a variety of on-board security chip set for midrange VPN and inside the device, significantly peripherals, and a standard bus DSLAM applications. lowering design cost.

SG2117-2 Development Tools

Tool Type Product Name Vendor Description

Hardware MPC8XXFADSMB Freescale Semiconductor For MPC8xx Family Application Development System Motherboard Development MPC8260ADS-P Freescale Semiconductor MPC8260 Application Development System

PowerQUICC Integrated > MPC860 family, including the > PowerQUICC and PowerQUICC II Communications Processors MPC860SAR microcodes packages provide > MPC850 family, including the > MPC862 with enhanced ATM support enhanced forwarding plane features MPC850SR > MPC8255, MPC8260, MPC8264, MPC180/184/185 Security > MPC857T with enhanced ATM MPC8265 and MPC8266 Processors. support PowerQUICC II next-generation family