How to Connect TP-XZ000-G7 to Airtel Xstream Broadband?

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I am having the same issue that @user848654 with the TP-XZ000-G7 XPON where the device turns off its LAN port when you enter the correct S/N and connect the Optic Fiber.

Has anyone possibly found a workaround for this issue?
 
So well I couldn't return the XPON so I just went ahead and got a UART Serial to debug. IIRC somebody said that UART wasn't working but seems like it just works fine. Got the following logs after I start plug in the Fiber Cable.

Code: 
gpon move from O1 to O2
gpon move from O2 to O3
gpon move from O3 to O4
gpon move from O4 to O5

gcOmci_FLowOperationConfig Start
before send out event 200, gcs_task gcs_task, msqid 163845, pid227=============================
[1451607474.392]gcomci: wrapperPhysicalLayerLinkEventSend()#1294 send gcs event:GCS_EVENT_WAN_LINK_UP notify SUCCESS.

mib reset!!!
gcOmci_FLowOperationConfig End
Sorry, rule does not exist.
tableSize=204
tableSnapshotSize=232
MEtypetable:

[1451607478.268]gcomci: gcOmci_common_tableAttribute_set_withTableKey_and_deleteWithSpecialTableBody()#503 table entry to be delete is not exist
gcomci: gcOmci_pmAlarmEventTimerAdd()#2607 eventId=13, waitTime=60
gcOmci_FLowOperationConfig Start
before send out event 101, gc_omcid gcs_task, msqid 229383, pid246=============================
before send out event 101, loopdetect gcs_task, msqid 393228, pid736=============================
gcloopdetect select error(return < 0)
OMCI receive GCS_EVENT_LAN_LINK_DOWN
gcOmci_FLowOperationConfig End
br0: port 1(eth0.0) entered disabled state

free getNext snapshot meClas:011f(omci) meInst:0000

Seems like it something to do with
OMCI receive GCS_EVENT_LAN_LINK_DOWN

Which means Airtel is sending via OMCI to turn off the LAN Link for some reason (possibly the bridge mode config for the Nokia ONU).
I could confirm that OMCI configuration causes this by killing gc_omcid (OMCI Daemon process) which prevents the link from going down. But this will in turn break the PON configuration because other important things are configured by the ONT via OMCI.

I have tried using ifconfig to turn the interface back on but this doesn't seem to work properly for some reason. I'll continue debugging it.
 
Okay so I had no breakthroughs with the XZ000-G7 Ethernet port turn off issue. And I feel there are underlying problems with that ONT anyway. I instead managed to get a XZ000-G3 V1 which has the exact same issue with the port turning off. I will soon connect it via UART and see what can be done about it.
 
I got a TP-Link X7000-G7 ONU. I already have a Airtel ONT in bridge mode with VLAN 100. When I am trying to set up Tplink ONU by copying GPON S/N and VLAN as 100 it does not connect via PPPoE. Did anyone had success with Tplink G7 ONU ?
 
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