AAC / CellSMART Quad Cell Protocl Module
(4 ports; up to 2.048 Mbps/port)

General
Interface types supported	Two, user-selectable interfaces: ATM UNI (for network or user ports) SMDS SNI (user ports only)
Mates with these PLMs	Quad DSX-1 Quad E1
Processing capacity	2.048 Mbps (4528.3 cells/second) per port
Traffic types handled	CBR, rt-VBR, and nrt-VBR

Connections
Number of virtual connections, per port	ATM UNI Mode: Up to 256 VPCs or 1024 VCCs or combinations up to 1024 total connections SNI Mode: 1 VC with MID multiplexing capability

Connections

Number of virtual connections, per port

ATM UNI Mode: Up to 256 VPCs or 1024 VCCs or combinations up to 1024 total connections

SNI Mode: 1 VC with MID multiplexing capability

Traffic and Congestion Management
Cell emission scheduling for minimal CDV	Per VC for CBR. Per input port for VBR.
General	Congestion management algorithm with Early Packet Discard and 4 VBR priorities. CBR is not subject to congestion management.
Input queuing	Separate non-blocking queues for CBR and rt-VBR versus nrt-VBR.
Maximum burst size/burst tolerance	210 cells
Output queuing	Separate output queues for CBR and rt-VBR versus nrt-VBR, with traffic and congestion management cpability.
Rate control	MAR and SCR rate control for CLP₀₊₁, per VC

Statistics Collection
Statistics collected per port	Number of valid cells Number of cells discarded for HEC errors Number of cells discarded for SCR violation Number of cells discarded for congestion Number of cells discarded for invalid connection identification

Statistics Collection

Statistics collected per port

Number of valid cells

Number of cells discarded for HEC errors

Number of cells discarded for SCR violation

Number of cells discarded for congestion

Number of cells discarded for invalid connection identification

Standards Compliance
Meets applicable requirements of the following standards/generic requirements	ATM Forum UNI Version 3.0, September 1993, "User-Network Interface Specification" ATM Forum UNI Version 3.1, September 1994, "User-Network Interface Specifications" Bellcore GR-2848-CORE, June 1994, "Broadband Multi-service User-Network Interface Generic Requirements" Bellcore TR-TSV-000772, May 1991, "Generic Requirements in Support of Switched Multi-Megabit Data Service" Bellcore GR-1113-CORE, July 1994, "Asynchronous Transfer Mode (ATM) and ATM Adaptation Layer (AAL) Protocols Generic Requirements" Bellcore GR-2842-CORE, November 1994, "ATM Service Access Multiplexer (SAM) Generic Requirements" Bellcore TA-NWT-001110, August 1992, "Broadband ISDN Switching System Generic Requirements" ITU-T Recommendation 1.413, "Broadband ISDN User-Network Interface" ITU-T Recommendation 1.311, "Broadband ISDN General Aspects" ITU-T REcommendation 1.150, "Asynchronous Transfer Mode Functional Characteristic" ITU-T Recommendation 1.361, "Broadband ISDN ATM Layer Specification" ITU-T Recommendation 1.363, "Broadband ISDN Adaptation Layer Specification" ITU-T Recommendation 1.371, "Traffic Conrol and Congestion Control in B-ISDN" SMDS Interest Group SIG-TS-008/1994, May 1994, "Protocol Interface Specification for Implementation of SMDS over an ATM-based Public UNI"

Standards Compliance

Meets applicable requirements of the following standards/generic requirements

ATM Forum UNI Version 3.0, September 1993, "User-Network Interface Specification"

ATM Forum UNI Version 3.1, September 1994, "User-Network Interface Specifications"

Bellcore GR-2848-CORE, June 1994, "Broadband Multi-service User-Network Interface Generic Requirements"

Bellcore TR-TSV-000772, May 1991, "Generic Requirements in Support of Switched Multi-Megabit Data Service"

Bellcore GR-1113-CORE, July 1994, "Asynchronous Transfer Mode (ATM) and ATM Adaptation Layer (AAL) Protocols Generic Requirements"

Bellcore GR-2842-CORE, November 1994, "ATM Service Access Multiplexer (SAM) Generic Requirements"

Bellcore TA-NWT-001110, August 1992, "Broadband ISDN Switching System Generic Requirements"

ITU-T Recommendation 1.413, "Broadband ISDN User-Network Interface"

ITU-T Recommendation 1.311, "Broadband ISDN General Aspects"

ITU-T REcommendation 1.150, "Asynchronous Transfer Mode Functional Characteristic"

ITU-T Recommendation 1.361, "Broadband ISDN ATM Layer Specification"

ITU-T Recommendation 1.363, "Broadband ISDN Adaptation Layer Specification"

ITU-T Recommendation 1.371, "Traffic Conrol and Congestion Control in B-ISDN"

SMDS Interest Group SIG-TS-008/1994, May 1994, "Protocol Interface Specification for Implementation of SMDS over an ATM-based Public UNI"

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