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AP8082DN and AP8182DN
Hardware Installation and Maintenance Guide
5.
6.
7.
The output power of an 802.3af PSE port is 15.4 W, that of an 802.3at PSE port is 30 W, and that of an
802.3bt PSE port is 60 W.
4.2 An Optical Interface Cannot Turn Up
Fault Description
After an optical interface is connected to a remote device through an optical fiber, its LINK
indicator is off.
Possible Causes
l
l
Troubleshooting Procedure
1.
2.
3.
Issue 03 (2019-04-01)
Check whether the configuration on the power sourcing equipment causes PoE power
supply errors, such as the PoE function is disabled or the power-off time range is
incorrectly set.
Check whether the network cable or distribution frame is faulty.
If the device still cannot be powered on, the device itself is faulty. Contact technical
support personnel or Huawei agent and ask them to replace the device.
NOTE
The optical fiber is faulty.
The optical module on the optical interface cannot meet the requirements.
Replace the optical fiber and optical module and check whether the optical interface can
turn Up. Ensure that the optical module meets the following requirements.
Determine optical module attributes.
– The optical module has passed Huawei certification.
– The transmission speed of the optical module is the same as the interface speed.
– Check whether the wavelength of the optical module is the same as that of the
remote optical module.
– The transmission distance of the optical module is suitable for the actual distance
between the two devices.
NOTE
l The transmission distance of an optical module is 10 km, 15 km, 20 km, 40 km, or 80
km. The optical modules with a longer transmission distance have a higher transmit
power. If an optical module with a long transmission distance is used for short-distance
transmission, the optical interface cannot turn Up because the transmit power is too high.
The high transmit power may even burn the receiver of the remote optical module. To
reduce the transmit power in this situation, use an optical attenuator between the optical
module and optical fiber.
l Optical modules with different speeds are available, for example, 155 Mbit/s, 622
Mbit/s, and 1.25 Gbit/s. You must use an optical module with the same speed as the
optical interface to ensure efficient optical transmission.
If the interface remains Down, contact technical support personnel.
Copyright © Huawei Technologies Co., Ltd.
4 Hardware Failures
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