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Supplement a, Medium Attachment Unit and Baseband Medium Specifications for Type 10BASE2, defines the functional, electrical, and mechanical characteristics of the Medium Attachment Unit (MAU) and one specific medium for use with local area networks. The purpose of the MAU is to provide a simple, inexpensive, and flexible means of attaching devices to the local area network medium. Supplement b, Broadband Medium Attachment Unit and Broadband Medium Specification, Type 10BROAD36, defines the function, electrical, and mechanical characteristics of the Broadband Medium Attachment Unit (MAU) and the specific single- and dual- cable broadband media for use with local area networks. The headend frequency translator for single-cable broadband systems is also defined. Supplement c, Repeater Set and Repeater Unit Specification for Use with 10BASE5 and 10BASE2 Networks, specifies a repeater for use with these two networks; it connects segments of network medium together, thus allowing larger topologies and a larger MAU base than allowed by rules governing individual segments. This specification replaces the existing Section 9 of the IEEE 802.3 standard. Supplement e, Physical Signaling, Medium Attachment, and Baseband Medium Specification, Type 10BASE5, builds upon the first six major sections of ANSI/IEEE Std 802.3-1985.