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Huawei AP3x10xN&5x10xN&5x30xN&6x10xN&7x10xN
Hardware Installation and Maintenance Guide
Troubleshooting Procedure
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Issue 11 (2015-05-18)
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.
l The optical module has passed Huawei certification.
l The transmission speed of the optical module is the same as the interface speed.
l The wavelength of the optical module is the same as that of the remote optical module.
l 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. It is recommended that you use an optical module with the same speed as
the optical interface to ensure efficient optical transmission.
If the interface remains Down, contact Huawei technical support.
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
4 Hardware Failures
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