Tag Archives: GPON

I will give below an example of some commands and their description for managing users who manage the device.

Continue reading “Create and manage users on the Huawei SmartAX MA5683T”

Suppose Huawei MA5683T has already added a lot of ONTs and they work, dba-profile created, but we need to add an ONT with a VLAN that has not yet been added and profiles have not been created with it.

Continue reading “How to add ONT with new VLAN on Huawei MA5683T”

I recently noticed a problem that, when ONT, the Huawei EchoLife HG8110, HG8120 and HG8120R watched the Ethernet ports shutdown about 30 seconds after the ONT was turned on.
At the same time, ONT continued to work, the optical connection did not disappear.
On the Huawei EchoLife HG8110 the link did not disappear, but the interface ONT 192.168.100.1 stopped pinging.

The cause was defective power supplies.

On the test I will use ONT Huawei EchoLife HG8120 (works only in Bridge mode as a media converter) and Huawei EchoLife HG8120R (can work as Router & Bridge, with reset settings has no configuration, so it works the same as HG8120 in Bridge mode).
The standard IP for both models is 192.168.100.1, the login is telecomadmin, the password is admintelecom.
I will use VLAN 228 for the Internet.

Continue reading “Adding ONT Huawei EchoLife HG8120 and HG8120R”

Sometimes on Huawei OLT you can see Dying gasp Alarm (0x2e11a00b).

Since they often occur, most likely they can be seen by running the commands:

display alarm active alarmid 0x2e11a00b
display alarm history alarmid 0x2e11a00b

I will give an example:

ALARM 531377 FAULT MINOR 0x2e11a00b SERVICE QUALITY 2017-12-06 08:19:27+02:00
ALARM NAME : The dying-gasp of GPON ONTi (DGi) is generated
SRVEFF : SA
PARAMETERS : FrameID: 0, SlotID: 5, PortID: 6, ONT ID: 32, Equipment ID:
TL-GP110
DESCRIPTION : The ONT is power off
CAUSE : The power supply of the ONT is abnormal
ADVICE : Check the power supply of the ONT and ensure that the power
supply works in the normal state

These alarms occur when power is lost or the power cord is removed from the ONT, at this moment ONT manages to send the Dying gasp message to the OLT.
Dying gasp is also used on many other devices, for example, to correctly terminate the connection.

Recently noticed that OLT (MA5683T) disables one ONT and reports an alarm “0x2e112007”.

After watching the alarm history:

display alarm history all
display alarm active all
alarm active clear all
display alarm active all

Observed the following:

ALARM 470141 FAULT WARNING 0x2e112007 SERVICE QUALITY 2017-10-19 09:17:50+02:00
ALARM NAME : The distribute fiber is broken or OLT can not receive
expected optical signals from GPON ONT(LOSi)
SRVEFF : SA
PARAMETERS : FrameID: 0, SlotID: 4, PortID: 3, ONT ID: 38, Equipment ID:
I-010G
DESCRIPTION : The OLT cannot receive expected optical signals from the ONT
in four consecutive frames
CAUSE : (1) The fiber is broken
(2) The quality of the optical path is poor
(3) The ONT hardware fails
ADVICE : (1) Check tributary optical fiber connection and backbone
optical fiber orderly, clean the fiber connector and replace
the fiber if necessary
(2) Ensure that the optical attenuation of the optical path is normal
(3) Reset the ONT or replace the ONT
— END

I tried to activate ONT:

interface gpon 0/4
ont activate 3 38
quit

But OLT still turned it off, at different intervals of 1-10 minutes.

Example of viewing the statistics of the number of alarms:

display alarm statistics

Viewing the alarm configuration:

display alarm configuration 0x2e112007

The ONT model was TP-Link GP110 with a signal of -15 for receiving and 2.1-2.7 for sending.
We tried to replace ONT with Alcatel-Lucent I-010G, the signal became -17, and OLT even more often began to turn it off.
Cleaning the connectors and digesting the dividers also did not help.

The problem was in a sagging piece of cable that hung from a very high altitude, after its replacement, the alarm disappeared, and the send signal became stable 2.46.