Category 5 Wiring Standards | |||||||
Pin | EIA / TIA 568A | AT&T 258A, or EIA / TIA 568B | 10Base-T 10 Mbps Cat3 | 100Base-TX 100 Mbps Cat5 | 100Base-T4 100 Mbps Cat3 | 100Base-T2 100 Mbps Cat3 | 1000Base-T 1Gbps Cat5+ |
1 | white / green | white / orange | TX+ | TX+ | TX D1+ | BI DA+ | BI DA+ |
2 | green / white (solid green) | orange / white (solid orange) | TX- | TX- | TX D1- | BI DA- | BI DA- |
3 | white / orange | white / green | RX+ | RX+ | RX D2+ | BI DB+ | BI DB+ |
4 | blue / white (solid blue) | blue / white (solid blue) | na | na | BI D3+ | na | BI DC+ |
5 | white / blue | white / blue | na | na | BI D3- | na | BI DC- |
6 | orange / white (solid orange) | green / white (solid green) | RX- | RX- | RX D2- | BI DB- | BI DB- |
7 | white / brown | white / brown | na | na | BI D4+ | na | BI DD+ |
8 | brown / white (solid brown) | brown / white (solid brown) | na | na | BI D4- | na | BI DD- |
BI=BI directional data RX=Receive Data TX=Transmit Data (Pairs may be solid colors and not have the stripe) | |||||||
(AT&T 258A) or (EIA/TIA 568B) RJ-45 10Base-T 100base-TX Crossover Pinout | ||||
(Normal End) | Pin # | (Switched End) | ||
white / orange | TX+ | 1 | RX+ | white/green |
orange / white (solid orange) | TX- | 2 | RX- | green / white (solid green) |
white / green | RX+ | 3 | TX+ | white / orange |
blue / white (solid blue) | na | 4 | na | blue / white (solid blue) |
white/blue | na | 5 | na | white / blue |
green / white (solid green) | RX- | 6 | TX- | orange / white (solid orange) |
white / brown | na | 7 | na | white / brown |
brown / white (solid brown) | na | 8 | na | brown / white (solid brown) |
Data Communications Cabling FAQ | |||
Cable: | Usage: | MHz: | Discription: |
Category 1 Cat 1 (1.2Kbps) | Telephone | - | Unshielded twisted pair used for transmission of audio frequencies. Used as speaker wire, door bell wire, etc. Not suitable for networking applications. |
Category 2 Cat 2 (4.0 Mbps) | LocalTalk Telephone | 1.5 | Unshielded twisted pair used for transmission at frequencies up to 1.5 Mhz. Used in analog telephone applications. Not suitable for networking applications. |
Category 3 Cat 3 (10.0 Mbps) | Voice 10Base-T | 16 | Unshielded twisted pair with 100 ohm impedance and electrical characteristics supporting transmission at frequencies up to 16 MHz. Defined by the TIA/EIA 568-A specification. |
Category 4 Cat 4 (20.0 Mbps) | Token Ring | 20 | Unshielded twisted pair with 100 ohm impedance and electrical characteristics supporting transmission at frequencies up to 20 MHz. Defined by the TIA/EIA 568-A specification. |
Category 5 Cat 5 (100.0 Mbps) | Ethernet 100Base-TX | 100 | Unshielded twisted pair with 100 ohm impedance and electrical characteristics supporting transmission at frequencies up to 100 MHz. Defined by the TIA/EIA 568-A specification. |
Category 5e Cat 5e Enhanced Cat 5 Cat 5+ | Fast Ethernet | 400 | Category 5e is a new standard that will specify transmission performance that exceeds Cat 5. Cat 5e has improved specifications for NEXT, PSELFEXT, and Attenuation. Like Cat 5, it consists of unshielded twisted pair with 100 ohm impedance and electrical characteristics supporting transmission at frequencies up to 100 MHz. To be defined in the TIA 568-A-5 update. |
Category 6 Cat 6 (2.4Gbps) | 550 | Category 6 is a proposed standard that aims to support transmission at frequencies up to 250 MHz over 100 ohm twisted pair. | |
Category 7 Cat 7 (100.0 Mbps) | 600 | Category 7 is a proposed standard that aims to support transmission at frequencies up to 600 MHz over 100 ohm twisted pair. | |
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