AAC / CellSMART Quad Packet Protocol Module
(4 ports, 2.048 Mbps/port)
- Specifications
- Ordering Information
- Support Information
- Datasheet
| General | |
| Interface types supported | Frame-based interfaces, user-selectable: ATM DXI/FUNI SMDS DXI SMDS Kentrox Cisco Interface (obsolete) Frame Relay UNI HDLC frames (frame forwarding mode of operation) |
| Mates with these PLMs | Quad DSX-1 Quad E1 Tri V.35/EIA-530 & DSX-1 Tri V.35/EIA-530 & E1 Quad V.35/EIA-530 |
| Processing capacity | 2.048 Mbps (4528.3 cells/second) per port |
| Services supported / mode of operation | SMDS over ATM via SMDS DXI or ATM DXI/FUNI Utilizes AAL3/4 Frame Relay over ATM Service or network interworking per VC via Frame Relay UNI Service interworking only via ATM DXI/FUNI Utilizes AAL5 HDLC Frame Forwarding (of HDLC framed data) Utilizes AAL5 |
| Traffic types handled | nrt-VBR, rt-VBR, UBR, and UBR+ |
| Connections | |
| Number of virtual connections per port | SMDS DXI Mode: 1 VC with MID multiplexing capability, all traffic routed to a connectionless server over an ATM UNI or to another port with an SMDS interface (AAL3/4) HDLC Frame Forwarding Mode: 1 VC for all HDLC frames. All traffic routed to a single destination (channel extension) over an ATM UNI or to another HDLC port (AAL5) Frame Relay UNI: 512 VCCs or DLCIs (AAl5) ATM DXI: Maximum of 512 connections, of which up to 255 can be VPCs (AAL5 or AA3/4) |
| Traffic and Congestion Managmeent | |
| General | Congestion management algorithm with partial packet discard and early packet discard and 4 VBR priorities. |
| Input queuing | Non-blocking input queue. |
| Maximum burst size / burst tolerance | 210 cells |
| Output queuing | VBR output queue, with traffic and congestion management capability. |
| Rate control | MAR and SCR rate control for CLP0+1, per VC |
| Reassembly | Up to 18 simultaneous reassembly buffers of packets up to 9232 octets in length. User-selectable increase in number of simultaneous reassemblies to 36 with MTU reduced to 4616 octets |
| Statistics Collection | |
| Statistics collected per port | Number of valid cells (input and output) Number of cells discarded for SCR violation Number of cells discarded for congestion Number of cells discarded due to corrupted AAL3/4 payload Number of valid packets (input and output) Number of packets discarded for invalid address (DLCI or DFA) Number of discarded input packets (FCS errors) Number of discarded AAL5 CPCS_PDSUs (CRC error after reassembly). Number of packets discarded due to reassembly timeouts Number of packets discarded due to unavailable reassembly buffer |
| Standards Compliance | |
| Meets applicable requirements of the following standards/generic requirements | Bellcore TR-TSV-000772, "Generic Requirements in Support of Switched Multi-Megabit Data Service, " May 1991 FRF.5, December 1994, "Frame Relay/ATM PVC Network Interworking Implementation Agreement." FRF.8, April 1995, "Frame Relay/ATM PVC Service Interworking Implementation Agreement." Bellcore GR-1113-CORE, "Asynchronous Transfer Mode (ATM) and ATM Adaptation Layer (AAL) Protocols Generic Requirements, " July 1994 Bellcore GR-2842-CORE, "ATM Serivce Access Multiplexer (SAM) Generic Requirements, " November 1994 Bellcore TA-NWT-001110, "Broadband ISDN Switching System Generic Requirements, " August 1992 ITU-T Recommendation 1.311, "Broadband ISDN General Aspects" ITU-T Recommendation 1.150, "Asyncronous Transfer Mode Functional Characteristic" ITU-T Recommendation 1.361, "Broadband ISDN ATM Layer Specification" ITU-T Recommendation 1.3.63, "Broadband ISDN Adaptation Layer Specification" ITU-T Recommendation 1.364, "Support of Broadband Connectionless Data Service on B-iSDN" ITU-T Recommendation 1.555, "Frame Relaying Bearer Service Interworking" ITU-T Recommendation 1.371, "Traffic Control 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" |