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

5.1.1.1.2.2 SONET-based STS-3c unshielded twisted pair (UTP-5) interface . The unshielded twisted pair interface shall be in accordance with ATM Forum specification AF-PHY-0015.000, sections 2, 3, 4, and 5.1.

5.1.1.1.2.3 SONET-based STS-3c shielded twisted pair (STP) interface . The shielded twisted pair interface shall be in accordance with ATM Forum specification AF-PHY-0015.000, sections

2, 3, 4, and 5.2.

5.1.1.2 Fiber channel, 155-Mbps physical layer interface . This interface is based on a direct cell-mapped framing

structure, which provides a payload rate of 149.760 Mbps.

5.1.1.2.1 Fiber channel, TC sublayer for 155-Mbps interface . This 155.52-Mbps TC sublayer uses direct cell mapping with 1 cell of each 27 cells carrying physical-layer overhead information. The TC sublayer functions of frame and cell delineation, clock recovery, and HEC generation/verification

(ITU-T I.432) shall be in accordance with the ATM UNI

specification, section 2.4.3.

5.1.1.2.2 Fiber channel, PMD sublayer for 155-Mbps interface . A PMD sublayer is specified in 5.1.1.2.2.1 for an optical interface, and in 5.1.1.2.2.2 for a shielded twisted pair interface for the 155.52-Mbps direct cell-mapped interface.

5.1.1.2.2.1 Optical interface . The fiber specifications shall be as specified in the ATM UNI specification, section

2.4.1.

5.1.1.2.2.2 Shielded twisted pair (STP) interface . This interface enables use of the installed 150-ohm cable plant and connectors, as currently used for IEEE 802.5 token ring networks. The interface shall be in accordance with the ATM UNI specification, section 2.4.2.

5.1.1.3 100-Mbps physical layer interface (optical) . This optical interface is based on the Fiber Distributed Data

Interface (FDDI) physical layer. The ATM cells are carried with no physical-layer framing structure.

5.1.1.3.1 TC sublayer for 100-Mbps interface . The TC sublayer functions of cell delineation and HEC generation/verification shall be in accordance with the ATM UNI specification, section 2.3.2.

5.1.1.3.2 PMD sublayer for 100-Mbps interface . Line coding for the 100-Mbps interface shall be in accordance with the ATM

UNI specification, section 2.3.1.