MIL-STD-188-176 Asynchronous Transfer Mode ATM, Standardized Profile for No S/S DocumentThe purpose of this military standard MIL-STD is to provide a profile of applicable standards to be used by all Department of Defense DOD activities and associated organizations when acquiring asynchronous transfer mode ATM products, systems, or services.

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MIL-STD-188-176

3.  DEFINITIONS

3.1  Terms.  Terms not listed below are as defined in

FED-STD-1037.

3.1.1  Acquisition authority .  An individual or team who, under federal law and acquisition regulations, has the authority to enter into, administer, or terminate a Government contract.

3.1.2  Asynchronous transfer mode (ATM)  .  A transfer mode in which the information is organized into cells.  It is

asynchronous in the sense that the recurrence of cells containing information from an individual user is not necessarily periodic.

3.1.3  ATM adapter (AA) .  A device used to allow non-ATM- user equipment to interwork over ATM networks.  Typically, AAs are used to make the lower layers of ATM-network elements match the lower layers of non-ATM-network elements.

3.1.4  ATM adaptation layer (AAL)  .  One of the layers of the

ATM protocol reference model.  It translates incoming data into

ATM cell payloads and translates outgoing cells into a format

readable by higher layers.

3.1.5  ATM bearer service .  The ATM bearer service (also known as cell relay bearer service) provides connection-oriented, sequence-preserving, cell-based communications service between

two or more ATM end systems at a variety of access rates and information-transfer rates.  The transfer of cells can take place in a bidirectional symmetric or bidirectional asymmetric fashion, either for point-to-point, point-to-multipoint, or multipoint-to- multipoint connections.  The service can be provided over permanent (provisioned) connections or over switched (on-demand) connections.  A bidirectional asymmetric connection includes one in which the assigned bandwidth in one direction is zero.

3.1.6  ATM end system .  A system in which an ATM connection is initiated or terminated.

3.1.7  ATM UNI.  A user-to-network interface (UNI) that complies with the ATM Forum's ATM UNI specification.  Terminals that comply with this MIL-STD are given ATM bearer service by ATM networks.

3.1.8  Bearer service .  A type of telecommunications service that provides the capability to transmit signals between user- network interfaces.

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