
266 ◾ Enterprise Architecture A to Z
9.4.1.2.3.7 1000BASE-CX (Short-Haul Copper)
GbE specifies the 1000BASE-CX PMD (including MDI) and baseband medium for short-haul
copper. 1000BASE-CX has a minimum operating range of 0.1 to 25 m. Jumper cables are used
to interconnect 1000BASE-CX PMDs. ese cables, however, cannot be concatenated to achieve
longer distances. A 1000BASE-CX jumper cable assembly consists of a continuous shielded bal-
anced copper cable terminated at each end with a polarized shielded plug. e transmitter needs
to meet the specifications in Table 9.13.
9.4.1.2.3.8 1000BASE-T
e 1000BASE-T PHY is one of the GbE family of high-spee ...