Huawei MA5600 - FAQ-Can the ONT Register with the OLT if the ONT Connected to the MA5680 T Is over 20 Km Away from the OLT

NGN Cases Chapter 3 GPON FTTx Cases
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2. Insert optical fibers that connect optical splitters of the first level to optical splitters of
the second level. After the optical fiber that connects an optical splitter of the first level to
an optical splitter of the second level is inserted, the fault recurs.
3. Check the ONUs connected to the optical splitter of the second level one after
another. After the optical fiber that connects the optical splitter to an ONU is removed,
the fault is rectified.
Suggestions and
Summary:
No exception alarm is generated on such faulty ONU and the fault persists after an ONU
is replaced. Therefore, the fault can be located only by excluding possible causes one
after another.
3.22 FAQ-Can the ONT Register with the OLT if the ONT Connected to the MA5680T Is Over
20 km Away from the OLT
Title:
FAQ-Can the ONT Register with the OLT if the ONT Connected to the MA5680T Is
Over 20 km Away from the OLT
ID: SE0000374358
Information
Type :
Troubleshooting Cases Quality Level:
C
Product Family:
Optical Access
Product:
MA5680T
Fault Type:
EPON Access Service
Keywords: Max distance
Permission
Level:
01Huawei Engineers Permission
Phenomenon De
scription:
Q:
Can the ONT register with the OLT if the ONT connected to the MA5680T is over 20 km
away from the OLT?
Alarm Informatio
n:
Null
Cause Analysi
s:
Null
Handling Proces
s:
A:
If the optical power is within the allowed range, the ONT can register with the OLT
though the ONT is over 20 km away from the OLT.
The maximum distance of the MA5680T, however, is 20 km by default, shown as
follows:
(config-if-epon-0/7)#display port info 2
------------------------------------------
F/S/P 0/7/2
Max distance(km) 20
Left bandwidth(kb) 989760
Autofind Enable
Laser switch On
Loopback status Disable
Tag attribute tag-based-ont
------------------------------------------
In the preceding information, Max distance indicates that if the ONT is over 20 km away
from the OLT, the ONT cannot be discovered automatically though the optical power is
within the allowed range. Therefore, run the following commands to modify this
parameter so that the ONT that is over 20 km away from the OLT can register with the
OLT:
(config-if-epon-0/7)#port 2 range