standards and guidelines for communication sites - Radio And ...
standards and guidelines for communication sites - Radio And ... standards and guidelines for communication sites - Radio And ...
EQUIPMENT CABLING CHAPTER 9: EQUIPMENT INSTALLATION Pair 2 Pair 3 Pair 1 Pair 4 Pair 3 Pair 2 Pair 1 Pair 4 T568A Connections T568B Connections FIGURE 9-10 8-PIN MODULAR JACK PINOUT Cable Pair Color 1 (term 4, 5) 2 (term 3, 6) 3 (term 1, 2) 4 (term 7, 8) white-blue (W-BL) blue (B) white-orange (W-O) orange (O) white-green (W-G) green (G) white-brown (W-B) brown (BR) Cable Pair Color 1 (term 4, 5) 2 (term 1, 2) 3 (term 3, 6) 4 (term 7, 8) white-blue (W-BL) blue (B) white-orange (W-O) orange (O) white-green (W-G) green (G) white-brown (W-B) brown (BR) NOTE: For both connectors, female jack is shown (view from FRONT (mating) end of connector shown 9-20 68P81089E50-B 9/1/05
STANDARDS AND GUIDELINES FOR COMMUNICATION SITES EQUIPMENT CABLING 9.9.6.4 CABLE INSTALLATION AND ROUTING Observe the following additional considerations for network cabling in addition to the general requirements throughout the rest of this manual: • Consideration should be given to using some method of cable management and containment for runs of CAT 5 cable. Such methods can be dedicated cable runs, lay-in wireways, cable trays and conduits. See ANSI/TIA/EIA-569-B and CSA-T530 for additional information. • CAT 5 cable shall not be installed in the same conduit, cable tray, outlet box, or similar device with AC power cables, unless separated by a barrier as allowed in NFPA 70-2005, Article 800-52. Doing so can be unsafe and is likely to cause EMI onto the CAT 5 cable, causing network errors. See NPFA 70-2005, Article 800.133, ANSI/TIA/EIA-568-B, 569-B, and CSA-T529, T530 for additional information. • Avoid routing CAT 5 cable near sources of EMI/RFI. Such noise sources may be electrical power wiring, dimmer switches, radio frequency transmitters, motors, generators, and fluorescent lights. Precautions include increasing the physical distance between the CAT 5 cable and the source of the EMI/RFI; installing the cable inside a grounded metallic conduit; or use of a CAT 5 100-ohm screened twisted pair cable as permitted by ANSI/TIA/EIA-568-B. Routing cables near sources of EMI/RFI can cause data errors and degraded system performance. See ANSI/TIA/EIA-568-B, 569-B and CSA-T529, T530 for additional information. • Cables shall be separated by at least 50.8 mm (2 in.) from AC power conductors. See NPFA 70-2005, Article 800.133 for additional information. • CAT 5 cables installed in ducts, plenums, and other air-handling spaces shall be installed in accordance with other chapters of this manual and NFPA 70-2005, Article 300.22. See also NFPA 70-2005, Article 645. • CAT 5 cables installed in hazardous areas as defined in NFPA 70-2005, Article 500 shall be installed in accordance with NFPA 70-2005, Article 500 and any other applicable electrical and building codes. • CAT 5 cable shall not be attached by any means to the exterior of a conduit or other raceway as a means of support. See NFPA 70-2005, Article 725.58 and NPFA 70-2005, Article 800.133 for additional information. • Suspended ceiling support rods and wires may be used as a means of support for computer network cabling if used in conjunction with appropriate cable fasteners. See ANSI/TIA/EIA-569-B and CSA-T530 for additional information. • CAT 5 cables shall not be laid directly on the tiles of a false ceiling. See Figure 9-7. (ANSI/TIA/ EIA-569(b)), NFPA 70-2005, Article 725.7, 800.21, and 820.21). • CAT 5 cables shall not be run from one building to another building. If the computer network must be extended to another building, a specific cabling system shall be engineered. Options for extending from one building to another may include the use of fiber optic cable or a T-1. Computer network cabling entering and/or leaving a building shall be properly grounded and protected from surges as required elsewhere in this manual. 9.9.6.5 INSTALLATION PRACTICES • Avoid unnecessary junction points and cross-connects. Every added junction point and crossconnect can decrease the performance of the network. • Multiple appearances of the same cable at different locations, referred to as bridge taps, shall be avoided (see Figure 9-11). Each cable segment shall have only one source and one destination. 68P81089E50-B 9/1/05 9-21
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EQUIPMENT CABLING CHAPTER 9: EQUIPMENT INSTALLATION<br />
Pair 2<br />
Pair 3 Pair 1 Pair 4<br />
Pair 3<br />
Pair 2 Pair 1 Pair 4<br />
T568A Connections<br />
T568B Connections<br />
FIGURE 9-10 8-PIN MODULAR JACK PINOUT<br />
Cable Pair Color<br />
1<br />
(term 4, 5)<br />
2<br />
(term 3, 6)<br />
3<br />
(term 1, 2)<br />
4<br />
(term 7, 8)<br />
white-blue (W-BL)<br />
blue (B)<br />
white-orange (W-O)<br />
orange (O)<br />
white-green (W-G)<br />
green (G)<br />
white-brown (W-B)<br />
brown (BR)<br />
Cable Pair Color<br />
1<br />
(term 4, 5)<br />
2<br />
(term 1, 2)<br />
3<br />
(term 3, 6)<br />
4<br />
(term 7, 8)<br />
white-blue (W-BL)<br />
blue (B)<br />
white-orange (W-O)<br />
orange (O)<br />
white-green (W-G)<br />
green (G)<br />
white-brown (W-B)<br />
brown (BR)<br />
NOTE: For both connectors, female jack is shown (view<br />
from FRONT (mating) end of connector shown<br />
9-20 68P81089E50-B 9/1/05
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