AAL

ATM Adaptation Layer

AAL

(ATM Adaption Layer) The part of the ATM protocol that breaks up application packets into 48-byte payloads that become ATM cells when the 5-byte headers are attached. The AAL resides between the higher layer transport protocols and the ATM layer. The AAL comprises two layers: Convergence Sublayer (CS) and Segmentation & Reassembly Sublayer (SAR). There are four types of AALs, which are summarized below. See ATM.

AAL-1 Connection-oriented, Constant Bit Rate (CBR), such as DS1 and DS3.

AAL-2 Connection-oriented, Variable Bit Rate (VBR).

AAL-3/4 Connection-oriented and connectionless, Available Bit Rate (ABR).

AAL-5 Connection-oriented, Unspecified Bit Rate (UBR). Least amount of error checking and retransmission.

AAL-6 Connection-oriented, MPEG-2 video streams.

ATM Adaption Layer

The SSCS is a service dependent layer, while the CPCS provides common functions such as CRC checking and padding to fill out a 48-byte payload. The SAR converts the output of the CS into cells for the ATM layer.

AAL

Acronym	Definition
AAL➣American Airlines
AAL➣Art at the Library (Brighton Art Guild; Michigan)
AAL➣Average Annual Loss (insurance)
AAL➣Ankara Ataturk Lisesi (Turkish high school)
AAL➣Ambient Assisted Living (Europe)
AAL➣Add-A-Leaf (automotive modification)
AAL➣Adelaide Airport Limited (Australia)
AAL➣ATM Adaptation Layer
AAL➣Alaska Airlines
AAL➣Aborigines Advancement League (est. 1957; Australia)
AAL➣Active Assisted Living (EU)
AAL➣Advanced Academic Literacy
AAL➣African American Language
AAL➣Additional Adoption Leave (UK)
AAL➣Animal Adoption League (est. 1992)
AAL➣attorney at law
AAL➣Animation Art Ltd.
AAL➣Adelaide Airport Ltd. (Australia)
AAL➣Aid Association for Lutherans
AAL➣Australasian Association for Logic (Australia and New Zealand)
AAL➣Animals as Leaders (band)
AAL➣Anterior Axillary Line
AAL➣Above Aerodrome Level
AAL➣Asian Aviation Logistics (Bangkok, Thailand)
AAL➣Asynchronous Transfer Mode Adaption Layer
AAL➣Australian Air League
AAL➣Aalborg, Denmark - Aalborg (Airport Code)
AAL➣Alloy Annotation Language
AAL➣Acceptable Ambient Level
AAL➣Anatomical Automatic Labeling (digital human brain atlas)
AAL➣Association des Artistes Lorrains (French: Lorraine Artists' Association)
AAL➣Aero Acoustic Levitation
AAL➣Ames Aeronautical Laboratory
AAL➣Acceptable Ambient Limit
AAL➣Applied Action Level (environment)
AAL➣Additional Authorizations List
AAL➣Account Access Layer
AAL➣Analog PSTN Access Line
AAL➣Aircraft Approach Limitation
AAL➣Academy of Asian Leaders
AAL➣Active Alarm List
AAL➣Application Adaption Layer
AAL➣Authorized Allowance List
AAL➣Assembly on American Literature
AAL➣Arctic Aeromedical Lab (Fort Wainwright, AK)
AAL➣Asociacion Ambientalista Llastay
AAL➣Ateliers d'Art Liturgique (French: Liturgical Art Workshops)
AAL➣Aircraft Assignment Letter
AAL➣Association des Attachés Linguistiques (French: Association of Language Staff)
AAL➣Asiana Air Lines
AAL➣Anti-Acronym League
AAL➣Arthur Alexander Leach (junior high school, Winnipeg, Canada)
AAL➣Address Alignment Logic (computer science)
AAL➣Atelier d'Astronomie de Limoges (Astronomical Workshop of Limoges- France)
AAL➣Agence Alsace Lorraine (French real estate agency)

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