How is the FTTH line quality of my BSNL Bharat Fiber Connection?

[naman1208]

So i have recently got bsnl ftth service and its been good, lot better then traditional adsl2 system, So speed is great too but i want someone to look at these parameters of fibre cable and please help me to find out about the quality of fibre cable, So here are these parameters ......and i am unable to understand them.

EPON State	Registered and certified
OAM_Link	Established

Optical Module Input Power(dBm)	-17.4
Optical Module Output Power(dBm)	2.0
Optical Module Supply Voltage(uV)	3330000
Optical Transmitter Bias Current(uA)	11582
Operating Temperature of the Optical Module(°C)	61

 

[thenextstar]

Which ONT is this? @Shivam15

If they collect payment, it also gets adjusted with his operating share, so he wouldn't need to wait for a settlement from BSNL. However I doubt there is any such restriction, if you make the payment online it would still get credited to your account.

My input power hovers in the range of 26-30dBM. Bsnl guys who came to install said ideal power should be less than 30. I get full 50mbps on my connection. Should I ask them to rectify and improve?

PiNG is around 9-11 on ookla.

Temps are now 29C even with fan mod. It's extremely hot here!

 

[arunkadambanattu]

My Netlink HG323RGW onu shows these values... But I have Netlink's older type ONU. That shows Optical power input -15dBM. Why that new one losses -2dBm? Also the older one connection status shows 'Registered and Certified', but the new one shows 'Registered, not authenticated'

Tx Power	2.351759 dBm
Rx Power	-17.235378 dBm
Temperature	32.003906 C
Voltage	3.355000 V
Bias Current	14.500000 mA

 

[varkey]

@thenextstar If you go over the specifications of the device, most ONTs have a receive sensitivity of around -27 to -28 dBm (a class C+ device might support a lower input level), which is the lowest input power level that it would detect (ie as per manufacturer specifications). However, devices often do perform outside the given specifications, but it is certainly not guaranteed. I would aim for the input power level to be less than -27 dBm to compensate for any temporary variations.

I don't think this affects the max throughput though, I mean any value within the supported range should give the same performance (unlike the levels on copper)

 

[varkey]

@arunkadambanattu By older type ONU, which model do you mean? Each device can have different optical components so some variation is expected, especially with these cheap Chinese devices.

Registered and Certified would mean that the ONU was able to authenticate with the OLT based on the auth parameters. In the second case, it was not able to authenticate successfully. However, since the OLT doesn't seem to enforce authentication it just works. But in case the OLT enforces authentication, your second device would fail to register.

 

[vu3knb]

My Netlink HG323RGW onu shows these values... But I have Netlink's older type ONU. That shows Optical power input -15dBM. Why that new one losses -2dBm? Also the older one connection status shows 'Registered and Certified', but the new one shows 'Registered, not authenticated'

Tx Power	2.351759 dBm
Rx Power	-17.235378 dBm
Temperature	32.003906 C
Voltage	3.355000 V
Bias Current	14.500000 mA

Temperature - Is that of the whole ONU or optical unit ?

 

[arunkadambanattu]

This one is my older type onu. Do you have any idea about -2dBm loss? Is there any reading error?

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@arunkadambanattu By older type ONU, which model do you mean? Each device can have different optical components so some variation is expected, especially with these cheap Chinese devices.

Registered and Certified would mean that the ONU was able to authenticate with the OLT based on the auth parameters. In the second case, it was not able to authenticate successfully. However, since the OLT doesn't seem to enforce authentication it just works. But in case the OLT enforces authentication, your second device would fail to register.

 

[arunkadambanattu]

I think that temperature shows the whole unit.

 

[Shivam15]

Is there any way to improve the input power??

 

[vignesh_venkatesan]

Only your LCO can do it.
By Fixing damaged cables,bad splices etc

 

[isp007]

My input power hovers in the range of 26-30dBM. Bsnl guys who came to install said ideal power should be less than 30. I get full 50mbps on my connection. Should I ask them to rectify and improve?
View attachment 1627

PiNG is around 9-11 on ookla.

Temps are now 29C even with fan mod. It's extremely hot here!

data on ftth only works till -30dbm and its always recommended to keep the user power below 25 so if anytime fiber bends the power will show 2-3dbm up n down & connection will not get issue..