What could be the reason for extremely low uplink speed in FTTH?

shamshad · August 4, 2024, 5:40pm

Hello Experts.

Joplin · August 4, 2024, 5:43pm

Several possible reasons:

Signal issues
Network congestion
Equipment configuration
Limitation on the service plan
Electromagnetic interference
Issues in the provider’s network
Final user equipment
Malicious software
Hardware limitations
Folds in the fiber

Waddah_Ambrais · August 4, 2024, 5:56pm

Also:

The number of the users against the package
Link distance to the customer
Signal should be between 18 to 20 dB
Take a speed test over a laptop, if the speed package 100 MB and the speed test show 70 MB this means link OK and speed package ok
Package rules from the operator
Modem itself

Zubairullahshah · August 4, 2024, 5:58pm

Electromagnetic interference?

Also, check your device setting, any speed limitation?

Joplin · August 4, 2024, 6:01pm

It is less common, but electromagnetic interference can affect the electrical components that convert the optical signal in electrical signal.

Zubairullahshah · August 4, 2024, 6:02pm

FTTH issue mostly related to configuration changes at operator end.

How about DL speed?

shamshad · August 4, 2024, 6:35pm

Downlink is very good.

Receive level is good around -15 dBm.

F_A · August 4, 2024, 7:03pm

Also:

Maybe wrong config from the Core side for UL AMBR.

alsiyabi · August 23, 2024, 4:50pm

I can see that you are testing using laptop. Certain applications that work in the background might be using uplink bandwidth without your knowledge. Try make speed test using mobile phone.