APP100 AAL2 SAR Co-Processor - LSI Logic - #1

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APP100 AAL2 SAR Co-Processor Product Brief Features n Mixed-format editing n Dual modes for memory size and feature set selection: — Reduced Memory Mode: Requires no external memory; does not support internal CPS Switching, CID statistics, or DID lookups; these are supported by the APP5/3 instead — Normal Mode: supports internal CPS switching, CID statistics, and DID lookups n Handles up to 32,767 active conversations in each direction on up to 16,383 different active VCs in each direction (with the exception of CPS packet switching, when enabled). n Handles total of OC-48 under the following restrictions: — AAL2 assembly can occur at a maximum of OC-12 — AAL2 parsing can occur at a maximum of OC-12 — Bypass traffic can process at a maximum of OC-24 when both AAL2 and CPS (parsing and assembly) are processing at their respective OC-12 maximums (OC-12 assemblies + OC-12 parsing + OC-24 bypass = OC-48 total) — Bypass traffic can process at a maximum of OC-48 when no AAL2 and CPS (parsing and assembly) are processing n Parses AAL2 cells into constituent CPS Packets — Parses multiple CPS Packets per AAL2 cell — Parses CPS Packets straddling two or three AAL2 cells — Provides CPS Packets with unique user- provisioned Destination IDs to the Traffic Management block of the APP5xx/ APP3xx OVERVIEW The Advanced PayloadPlus 100 (APP100) is an AAL2 SAR Co-processor designed to work withthe APP5 and APP3 Series Network Processor toallow system designers more function and flexibility in support of programmable high-speed voice and data traffic. The APP100 provides ATM adaptation layer 2 (AAL2) protocol processing via the APP5 and APP3 co-processor or data path ports. Traffic requiring AAL2 processing is sent to the APP100, then back to the APP5/APP3 for routing and additional processing. The primary capabilities of the APP100 include the following: n Parses AAL2 cells to CPS packets. At OC- 12, supports a total of 32,767 unique conversations n Assembles AAL2 cells from CPS packetsAt OC-12, supports a total of 32,767 unique conversations n Carries up to 16,383 conversations on AAL2 VCs. n Supports up to 248 active voice channels per VC. n Supports CPS packet switching between VCs n Supports bypass of other traffic with remain- ing bandwidth available for IP/AAL5, up to OC-12 — Performs error checking at the cell and packet levels — Keeps statistics at the VC and individual conversation levels — Performs timeout function on partially completed CPS Packets n Assembles CPS Packets into AAL2 cells — Assembles multiple CPS Packets per AAL2 cell — Assembles CPS Packets straddling AAL2 cells — Provides AAL2 cells with unique user- provisioned Destination IDs to the Traffic Management block of the APP5/APP3 — Performs error checking at the cell and packet levels — Keeps statistics at the VC and individual conversation levels — Performs timeout functions on partially assembled AAL2 cells n Allows for non-AAL2/CPS data to be bypassed through the APP100 n Handles Type 3 Management Packets in Both Directions — In the AAL2 to CPS direction, handles Type 3 Management Packets in either active conversations or inactive conversations on active VCs — In the CPS to AAL2 direction, handles Type 3 Management Packets on active conversations n When enabled, performs CPS Packet Switching (CPS Packets from one AAL2 cell stream moved to different AAL2 cell streams) — Supports CID modification along with modified CPS HEC — Switching occurs at half speed operation — Switches up to 16383 conversations on up to 8191 VCs in each direction