Set: GPON SN, Modem-ID or ONT-ID

Hello @all,

I am a DNS:NET customer with Fiber to the Home.
There is a modem ID printed on my ONT (Fritz!box 5530 Fiber). According to the interface description of DNS:Net (link), this is used to authenticate the ONT.
As expected, I would like to switch off my Fritzbox and use my BPI R4, which supports SFP+ modules.

My questions:

  • Does anyone have OpenWRT running with DNS:Net
  • Is the “Equipment ID” the field in which the modem ID must be stored?

First of all: I have read many articles on this topic. The procedure to hack the SFP+ module to use a clone of the current one is not needed from my point of view. Because DNS:NET uses the MODEM-ID.

That ID is inside SFP module.

Which GPON module are you going to use with the R4?

I have DNS:NET with a bpi-r4 and a luleey sfp gpon running OpenWRT, so I can tell that this should work.
I think you have 2 options:

  1. Rung them up, tell them the ID of your gpon, wait until activated
  2. Copy the ID from the fritz modem (this is what I did). You call this "hacking" but most of those generic gpon modules allow you to set the ID in their webinterface.

I Buyed: "CONBIC GPON SFP Modul (FTTH) – Kompatibel mit Fritz!Box 5530 5590 Fiber, Glasfaser-Transceiver", from a known markedplace ;). In the Fritz!Box the SFP-Module is for 20KM so i have buyed the same from CONBIC.

Hello @bfrank,

I have not found the PON serial number: "AVMG6XXXXXXX", which is displayed in the Fritz!Box with ethtool (ethtool -m eth2) Since the PON ID or Modem-ID is printed on the Fritz!Box, I assumed that it is stored in the Fritz!Box. I then assume that I can access the values with the i2c-tools.
Can you tell me which values you have modfied?
Do you have a tutorial that you can recommend?

It looks like as if this module is only for the Fritz!Box 5530/5590.
If this is true, then it won't work in the BPi-R4 because it's no standard GPON module.
I know the Zyxel PMG3000-D20B (aka "Digitalisierungsbox Glasfasermodem") works fine with the BPI-R3, so maybe it will work with the R4 as well.
Or ask @bfrank for the exact type of module, as he states it's running fine with his R4.

Yeah you cannot use the FB module and from the looks neither the conbic as @elder_tinkerer commented.
I used the serial that was printed on the FB itself (or the module, not sure anymore) AVM6xxx looks correct though.

I have this module https://www.luleey.com/product/2-5g-xpon-stick-sfp-onu/

I did not run any command on my FB or anything. All info is from stickers on the HW or some "about" pages on the FB itself.

Hardware Version: enhanced ddm and sc apc?

Back then there was no ddm, but it reads like it does not make a difference. Sc/APC yes, you will need to order a cable as well due to the different sizes, like https://www.amazon.de/gp/aw/d/B08MVDRQGL?psc=1&ref=ppx_pop_mob_b_asin_title

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Did you make the configuration by a media changer or in the BPI R4?
I saw videos at youtube and they used a media changer.
I buyed a tp-link MC220L, but mostly because he was to cheap.

In the bpi r4,Kind of. The gpon module has a webinterface there I can configure things.

Hello @bfrank,

thanks for your support. My Luleey SFP+ has arrived.
Can you please check again which parameters you have changed?

Greetings Frank

I think most stuff is from the FB page in some "about" page (marked as FB in the screenshot).
The Modem-ID and Serial no. are printed at the bottom of the FB (but might also be on the page? no idea, sorry :see_no_evil_monkey: )
The LOID/PLOAM stuff i can't really remember but i gathered that from some other threads on the internet... at least some of it is your username and password :slight_smile:

Hi @bfrank,
Hi @all,

I have interesting effects.
I have configured my luleey LL-XS2510.
I used a media converter for this.

I think I did everything right.
But when I plug the sfp+ into the BPi R4, it seems that it does not start properly and works with the defaults:

kern.info kernel: [ 5306.230048] sfp sfp1: module OEM XPON-Stick rev sn XPON25060107 dc 250605

With ethtool -m eth2 | grep Vendor:
Vendor name : OEM
Vendor OUI : 00:00:00
Vendor PN : XPON-Stick
Vendor rev :
Vendor SN : XPON12345678

@bfrank:
Have you made any hardware modifications and e.g. removed the resistors for the i2c bug?
Did you build the OpenWRT image yourself?

One last Thing: I'm also not able to configure the module in the BPi R4. I don't get the Web-Interface. I tryed dhcp, static IP and unmanaged. I think that the Web-intaerface didn't start.

Thanks Frank

I did nothing. On 23.x it took a long time and i Bad to disable auto negotiation. Since 24.x it just works. What I remember, the gpon IP is the same as the default openwrt IP, so there some changes are needed.

Ah, another thing. I believe the gpon does not start if the fiber is not plugged.

Can you please check on the R4, if you get the same informations?

ethtool -m eth2 | grep Vendor:
Vendor name : OEM
Vendor OUI : 00:00:00
Vendor PN : XPON-Stick
Vendor rev :
Vendor SN : XPON12345678

If "yes" i have a config problem.
If "no" i have a problem with the module.

And if possible please send the output from "lsmod".

Thanks Frank