AAC / CellSMART Octal CES/CBR Protocol Module

General
Interface types supported	Serial constant bit rate.
Mates with these PLMs	Octal DS1 OctalDSX-1 Octal E1 Quad-Port V.35/EIA-530 DS3 E3 HSSI
Processing capacity	44.736 Mbps
Services supported	Structured or unstructured circuit emulation over AAL1 DS1/E1 to DS0 bundle mapping dynamic bandwidth allocation based on CAS signalling or Idle Code Detection

Connections
Number of supported VCs	32 (unicast or multicast) per port. 256 per slot

Traffic and Congestion Management
Cell emission scheduling	Done on a per connection basis to minimize CDV
General	No congestion management. Congestion may occur only due to misallocating bandwidth. This results in cell discard and immediate alarm.
Input queuing	Non-blocking input queue
Output queuing / reassembly	One reassembly output queue with user-controllable depth to 1 microsecond Depth influences CDVT (high depth = higher CDVT) Six cells reassembly latency. Latency is a one-time delay introduced at the activation of the connection.

Statistics Collection
Statistics collected per port	Number of valid cells transmitted and received Number of LOS/AIS/LOF cells transmitted and received Number of dummy cells inserted Number of cells with errored AAL1 headers Number of OAM cells tossed due to congestion (per slot) Number of seconds during which the input and output buffers overflowed (input counted per slot only) Number of seconds during which the output buffer underflowed Number of seconds during which received cells were tossed due to congestion Number of seconds during which the port performed sequence number reframes

Statistics Collection

Statistics collected per port

Number of valid cells transmitted and received

Number of LOS/AIS/LOF cells transmitted and received

Number of dummy cells inserted

Number of cells with errored AAL1 headers

Number of OAM cells tossed due to congestion (per slot)

Number of seconds during which the input and output buffers overflowed (input counted per slot only)

Number of seconds during which the output buffer underflowed

Number of seconds during which received cells were tossed due to congestion

Number of seconds during which the port performed sequence number reframes

Standards Compliance
Meets applicable requirements of the following standard/generic requirements	ATM Forum AF-SAA-0032 000, "Circuit Emulation Service Interoperability Specification, " June 1995 ATM Forum AF-VTOA-0078.000, "Circuit Emulation Service Interoperability Specification Version 2.0", January 1997 Bellcore GR-1113-CORE, "Asynchronous Transfer Mode (ATM) and ATM Adaptation Layer (AAL) Protocols Generic Requirements, " July 1994 Bellcore GR-2842-CORE, "ATM Service 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, "Asynchronous Transfer Mode Functional Characteristic" ITU-T Recommendation 1.361, "Braodband ISDN ATM Layer Specification." ITU-T Recommendation 1.363.1, "Broadband ISDN Adaptation Layer Specification Types 1 and 2, " 1996 ITU-T Recommendation 1.371, "Traffic Control and Congestion Control in B-ISDN."

Standards Compliance

Meets applicable requirements of the following standard/generic requirements

ATM Forum AF-SAA-0032 000, "Circuit Emulation Service Interoperability Specification, " June 1995

ATM Forum AF-VTOA-0078.000, "Circuit Emulation Service Interoperability Specification Version 2.0", January 1997

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

Bellcore GR-2842-CORE, "ATM Service 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, "Asynchronous Transfer Mode Functional Characteristic"

ITU-T Recommendation 1.361, "Braodband ISDN ATM Layer Specification."

ITU-T Recommendation 1.363.1, "Broadband ISDN Adaptation Layer Specification Types 1 and 2, " 1996

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

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