Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document.
Note: Even the most advanced machine translation cannot match the quality of professional translators.
Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
What Is the Ethernet Cable Length Required for AP Installation?
Table 5-3 described the Ethernet cable length required for AP installation.
Table 5-3 Ethernet cable types and maximum transmission distances supported by Ethernet interfaces
Interface Rate |
Ethernet Cable Type |
Maximum Transmission Distance |
|---|---|---|
FE |
CAT5 or higher |
100 m |
GE |
CAT5e or higher |
100 m |
2.5GE |
CAT5e or higher unshielded twisted pair (UTP) |
100 m |
CAT5e or higher shielded twisted pair (STP) |
200 m NOTE:
When the Ethernet cable is longer than 100 m, models of the switches connected by some APs are restricted. For details, see Cable Connection in the Hardware Installation and Maintenance Guide of the APs. |
|
5GE |
CAT5e UTP |
|
CAT5e STP |
100 m |
|
CAT6 or higher |
100 m |
|
10GE |
CAT-6A or CAT-7 |
100 m |
- 6-a-1 stands for the six-around-one cable bundle mode, with one cable in the center and six cables bundled evenly around it.
- Connecting UTP network cables to 5GE interfaces poses high risks and is not recommended. The causes are as follows:
- 802.3bz requires that the ALSNR value for alien crosstalk between network cables be greater than 0, but the standards for Cat5e and Cat6 unshielded twisted pairs do not specify the required ALSNR value. Therefore, such cables may not meet the crosstalk requirement in 802.3bz, causing severe problems such as continuous packet loss.
- According the cabling specification TIA TSB-5021, using Cat5e and Cat6 cables for 5G poses high risks.
- Currently, no clear onsite testing or evaluation method is available for checking whether ALSNR of cables conforms to 802.3bz.
- If Cat5e and Cat6 unshielded twisted pairs do not meet the 5G requirement, you are advised to replace them with shielded twisted pairs or reduce the rate of interfaces to 2.5G.