#REDIRECT TIA-568A/B
===TIA-568A and RJ-45 inconsistency=== This part of the RJ-45 article: :''The original concept'' (presumably RJ-11, RJ-14, RJ-25 and RJ-61) ''was that the centre two pins would be one pair, the next two out the second pair, and so on until the outer pins of an eight-pin connector would be the fourth twisted pair. Additionally, signal shielding was optimised by alternating the "live" and "earthy" pins of each pair. This standard for the eight-pin connector results in a pinout known as TIA-568A, but the outermost pair are then too far apart to meet the electrical requirements of high-speed LAN protocols. The variation known as TIA-568B overcomes this by using adjacent pairs of the outer four pins for the third and fourth pairs. The inner four pins are wired identically to TIA-568A.'' seems to suggest that the normal wiring of TIA-568A should be: # white/brown # green/white # white/orange # blue/white # white/blue # orange/white # white/green # brown/white (with pairs 2 and 3 swapped for 10/100Base-T crossover wiring), while according to the TIA-568A#Diagram it is actually: # white/green # green/white # white/orange # blue/white # white/blue # orange/white # white/brown # brown/white which, incidently, is exactly the same as TIA-568B crossover wiring according to the TIA-568B#Diagram (and vice versa, TIA-568A crossover is TIA-568B normal wiring). I am going to merge TIA-568A and TIA-568B articles for they differ only with the order of wires, whatever it is, but first I want to know whether the original diagrams which I have based the tables on are correct. They (the TIA-568A ones) seem to be incorrect in the context of RJ-45 article, unless the latter itself is incorrect. In any case, they both appear to be mutually contradictory and need to be corrected. User:Rfl 07:31, 30 Jul 2004 (UTC) Also, the RJ-45 article says: :''The variation known as TIA-568B overcomes this by using adjacent pairs of the outer four pins for the third and fourth pairs. The inner four pins are wired identically to TIA-568A.'' which is not true according to the TIA-568A#Diagram and table: # white/green # green/white # white/orange # blue/white # white/blue # orange/white # white/brown # brown/white and TIA-568A#Diagram and table: # white/orange # orange/white # white/green # blue/white # white/blue # green/white # white/brown # brown/white i.e. the inner four pins in TIA-568B are ''not'' wired identically to TIA-568A. Most probably, the quoted paragraph from RJ-45 is incorrect. User:Rfl 02:54, 1 Aug 2004 (UTC) == merging TIA-568A and B == I have merged these two articles, added extra material and deleted both TIA-568A and TIA-568B and installed redirects in their place. The merged article is TIA-568A/B. Let me know what you think. User:Karn 15 May 2005.
See other meanings of words starting from letter:
Words begining with TIA-568A:
TIA-568A
TIA-568A
TIA-568A/B
TIA-568A/B
TIA-568A
#REDIRECT TIA-568A/B
TIA-568A
===TIA-568A and RJ-45 inconsistency=== This part of the RJ-45 article: :''The original concept'' (presumably RJ-11, RJ-14, RJ-25 and RJ-61) ''was that the centre two pins would be one pair, the next two out the second pair, and so on until the outer pins of an eight-pin connector would be the fourth twisted pair. Additionally, signal shielding was optimised by alternating the "live" and "earthy" pins of each pair. This standard for the eight-pin connector results in a pinout known as TIA-568A, but the outermost pair are then too far apart to meet the electrical requirements of high-speed LAN protocols. The variation known as TIA-568B overcomes this by using adjacent pairs of the outer four pins for the third and fourth pairs. The inner four pins are wired identically to TIA-568A.'' seems to suggest that the normal wiring of TIA-568A should be: # white/brown # green/white # white/orange # blue/white # white/blue # orange/white # white/green # brown/white (with pairs 2 and 3 swapped for 10/100Base-T crossover wiring), while according to the TIA-568A#Diagram it is actually: # white/green # green/white # white/orange # blue/white # white/blue # orange/white # white/brown # brown/white which, incidently, is exactly the same as TIA-568B crossover wiring according to the TIA-568B#Diagram (and vice versa, TIA-568A crossover is TIA-568B normal wiring). I am going to merge TIA-568A and TIA-568B articles for they differ only with the order of wires, whatever it is, but first I want to know whether the original diagrams which I have based the tables on are correct. They (the TIA-568A ones) seem to be incorrect in the context of RJ-45 article, unless the latter itself is incorrect. In any case, they both appear to be mutually contradictory and need to be corrected. User:Rfl 07:31, 30 Jul 2004 (UTC) Also, the RJ-45 article says: :''The variation known as TIA-568B overcomes this by using adjacent pairs of the outer four pins for the third and fourth pairs. The inner four pins are wired identically to TIA-568A.'' which is not true according to the TIA-568A#Diagram and table: # white/green # green/white # white/orange # blue/white # white/blue # orange/white # white/brown # brown/white and TIA-568A#Diagram and table: # white/orange # orange/white # white/green # blue/white # white/blue # green/white # white/brown # brown/white i.e. the inner four pins in TIA-568B are ''not'' wired identically to TIA-568A. Most probably, the quoted paragraph from RJ-45 is incorrect. User:Rfl 02:54, 1 Aug 2004 (UTC) == merging TIA-568A and B == I have merged these two articles, added extra material and deleted both TIA-568A and TIA-568B and installed redirects in their place. The merged article is TIA-568A/B. Let me know what you think. User:Karn 15 May 2005.
See other meanings of words starting from letter:
T
TA | TB | TC | TD | TE | TF | TG | TH | TI | TJ | TK | TL | TŁ | TM | TN | TO | TP | TR | TS | TU | TW | TX | TY | TZ |Words begining with TIA-568A:
TIA-568A
TIA-568A
TIA-568A/B
TIA-568A/B
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