Reference Material - Cabling
Reference Material - Cabling Information Courtesy: Access Communications Pty. Ltd.
Modular Plug/Jack Types There are several modular jack sizes and variations.
6 Position The 6 position modular plug is most commonly used for line cords in voice applications and is often referred to as Rj11 or Rj12. The 6 position poly- carbonate body can be loaded with only the centre 2 or 4 gold contacts or can be fully loaded with all 6 contacts. For basic 2 wire voice applications, the centre 2 contacts are used and the plug should be correctly described as 6P2C (6 position, 2 contact). Where 4 wires are required for Key Telephone Stations or 2 lines etc., The centre 4 contacts are used and the plug should be correctly described as 6P4C. In applications which require 6 wires, all contacts are loaded and the plug is called 6P6C.
4 Position The 4 position modular plug (4P4C) is narrower than the 6 position modular plug. Usually only used on coiled telephone handset cords, although occasional ly used for other applications.
8 Position The 8 position modular plug is now becoming the standard for data and voice applications. This jack is usually referred to as Rj45. The plug body is usually supplied with all 8 gold contacts loaded is to be correctly referred to as 8P8C. For basic voice line cords the plug may be loaded with only the centre 2 or 4 gold contacts and refered to as either an 8P2C or 8P4C. For data applications, several color coding sequences are used for the conductor pairs. In Australia, the most widely used system is known as T568A.
10 Position The 10 position (10P10C) modular plug has the same width body as the 8 position but has an extra contact added on each side.
MMP The MMP - Modified Modular Plug is proprietary variation of the 6 position plug which was developed by Digital Equipment Corporation (DEC). The MMP plug has the latch shifted from the centre to one side to aviod the possibility of interchanging DEC data wiring and a normal telephone line plug. MMP is also referred to as DEC-Connect or MMJ. An 8 position keyed modular plug is also available but is not commonly used in Australia.
NOTE We recommend adoption of 8P8C, 6P4C terminology when describing modular plus and jacks. This is a definite way to avoid confusion between similar plugs.
The codes Rj11, Rj12, Rj45 and other RJ (Registered Jack) numbers actually specify various wiring configurations used in the USA, not actual Plug and Jack types.
Modular Plug Variations
Round or Flat Cord Entry The 2 variations of modular plug exist to accommodate either Flat or Round cord. The lower face of the cord entry on the rear of the plug body can be either Flat or Round.
The round type should always be used when terminating Cat- 5E or Cat-6 or other round cords to ensure that the jacket and conductors are not crushed during termination. Flat cord plugs must be used to ensure adequate cord strain relief of flat cord.
Round
Flat
Contacts for Solid or Standard Conductors The IDC (Insulation Displacement Contact) section of gold contacts can be designed for either solid conductors or stranded conductors. Plugs for solid wires have a 3 pronged contact which forks over the solid conductor whilst the contacts for stranded conductors have 2 spikes which penetrate between the strands. Failure to use the correct contact type will result in unreliable terminations.
Solid
Stranded
Modular Plug Terminations Recommendations
Always use a modular plug with the correct contacts for stranded conductors or solid conductors.
Do not terminate flat cord plugs onto round & vice versa.
Avoid plugging 6 position plugs into 8 position sockets where possible.
Use quality tools for crimping modular plugs. Avoid RJ11, RJ45 Terminology to avoid confusion.
Ensure plugs with suitable grade of gold plating are used.
Avoid excessive bending or squashing of Data Cable jackets.
Use plug boots to provide extra strain relief.
www.accesscomms.com.au 168 Sales and Support, Call: 1300 ADI ADI Technical Support, Call: 1800 220 345
www.adiglobal.com/au
Services
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92 |
Page 93 |
Page 94 |
Page 95 |
Page 96 |
Page 97 |
Page 98 |
Page 99 |
Page 100 |
Page 101 |
Page 102 |
Page 103 |
Page 104 |
Page 105 |
Page 106 |
Page 107 |
Page 108 |
Page 109 |
Page 110 |
Page 111 |
Page 112 |
Page 113 |
Page 114 |
Page 115 |
Page 116 |
Page 117 |
Page 118 |
Page 119 |
Page 120 |
Page 121 |
Page 122 |
Page 123 |
Page 124 |
Page 125 |
Page 126 |
Page 127 |
Page 128 |
Page 129 |
Page 130 |
Page 131 |
Page 132 |
Page 133 |
Page 134 |
Page 135 |
Page 136 |
Page 137 |
Page 138 |
Page 139 |
Page 140 |
Page 141 |
Page 142 |
Page 143 |
Page 144 |
Page 145 |
Page 146 |
Page 147 |
Page 148 |
Page 149 |
Page 150 |
Page 151 |
Page 152 |
Page 153 |
Page 154 |
Page 155 |
Page 156 |
Page 157 |
Page 158 |
Page 159 |
Page 160 |
Page 161 |
Page 162 |
Page 163 |
Page 164 |
Page 165 |
Page 166 |
Page 167 |
Page 168 |
Page 169 |
Page 170 |
Page 171 |
Page 172 |
Page 173 |
Page 174 |
Page 175 |
Page 176 |
Page 177 |
Page 178 |
Page 179 |
Page 180 |
Page 181 |
Page 182 |
Page 183 |
Page 184 |
Page 185 |
Page 186 |
Page 187 |
Page 188 |
Page 189 |
Page 190 |
Page 191 |
Page 192 |
Page 193 |
Page 194 |
Page 195 |
Page 196 |
Page 197 |
Page 198 |
Page 199 |
Page 200