Can someone explain Optics Module Status? Is mine good or bad?

@abiswas25 Tx signal level is perfectly fine.

Just curious has any ISP in India rolled out Active Optical Networks?

Sounds expensive to have dedicated connection to every ONT from OLT though right?

So I am curious how does this gigabit fiber link work.. if the maximum throughput through a fiber strand is lets say 2,4 Gbps, then it can support only 2 gigagit customers right.
Or lets go down, lets take the case of BSNL 300mbps customers, so one fiber strand will go only to less than 10 ONTs ?.. i think the olt supports way more onts in each of its port

That 2.4Gbps will be shared among many people. The ISP doesn't expect everyone to use their full bandwidth all the time. So for example a 2.4Gbps link will be shared among 20 people on Gigabit plan.


This is why speeds sometimes drop during evening and night time. When more people are using the network.

Just add something,there is no fixed bandwidth for fiber as of now.
We have limited ability to turn off and on the laser diodes.Thus we can send limited bits only.
It's fixed bandwidth but not everyone use maximum bandwidth all the time.

JB701 said:

That 2.4Gbps will be shared among many people. The ISP doesn't expect everyone to use their full bandwidth all the time. So for example a 2.4Gbps link will be shared among 20 people on Gigabit plan.

Contention ratio - Wikipedia

en.wikipedia.org

This is why speeds sometimes drop during evening and night time. When more people are using the network.

Click to expand...

Oh i see, so whats the typical contention ratio used by providers here ? I googled about it and found something funny
Jesmon Joy Karippery vs Bharat Sanchar Nigam Limited on 8 October, 2020 😛

Okay back to question. So the contention ratio has to very low for gigabit lines to work right.. Lets say if they use same fiber for 18 users with gigabit plans and all of them are using it to max like torrent downloads or uploads, then its going to make a signficant impact..

or 30 300mbps using connection simultaenously downloading from torrent.. Its all edge cases but yeah still especially the case of gigabit lines

BSNL and bigger ISPs are usually more strict in maintaining a stricter contention ratio. So, you likely won't encounter last mile congestion issues on these ISPs.

As for local ISPs, even most of these achieve the advertised speeds until their own servers and peered services. Its usually international speeds that they struggle with.

Most of the users of an ISP are on the cheapest plans. So even if there is one Gigabit user on shared fiber in the last mile, it likely won't be a problem.

Realme said:

Just curious has any ISP in India rolled out Active Optical Networks?

Click to expand...

yupp I'm on a fiber network

Can someone let me know mine Optic module statues good or bad? I think Laser Bias current is low.
Capture new789

Laser Bias Current (ONT ANI-ONT-Side Optical Measurements):

7800 uA

Optics Module Voltage (ONT ANI-ONT-Side Optical Measurements):

3257000 uV

Optics Module Temperature (ONT ANI-ONT-Side Optical Measurements):

45.40 °C

Rx Optics Signal Level at 1490 nm (ONT ANI-ONT-Side Optical Measurements):

-24.09 dBm

Tx Optics Signal Level at 1310 nm (ONT ANI-ONT-Side Optical Measurements):

2.18 dBm

Lower (ONT ANI-ONT-Side Optical Measurements-Optical Threshold):

-27.95 dBm

Upper (ONT ANI-ONT-Side Optical Measurements-Optical Threshold):

-7.00 dBm