AV1200 passthrough prevents BThomehub4 from getting broadband signal

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AV1200 passthrough prevents BThomehub4 from getting broadband signal

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
AV1200 passthrough prevents BThomehub4 from getting broadband signal
AV1200 passthrough prevents BThomehub4 from getting broadband signal
2016-08-24 06:57:56
Model :

Hardware Version :

Firmware Version :

ISP :

Installing an AV1200 passthrough powerline adapter prevents my BT HomeHub4 DSL router from getting a broadband connection.

These are the symptoms:
Before - works: A TPlink AV500 passthrough powerline connector has been in use for a couple of years with my BT HomeHub4. It has worked fine. The configuration is this: AV500 in the wall socket, power to the HomeHub4 from the passthrough socket on the AV500 unit, Ethernet cable connected to the RJ45 socket on the AV500 unit.

After - fails:
Today, I installed the AV1200 version in the same configuration. After pairing the AV1200 units together, I connected the BT HomeHub to the power outlet on the new AV1200 passthrough powerline adapter and switched on the Home Hub. This caused the Home Hub to fail to connect to a DSL signal. I left it all day. The situation did not improve. I then went back to the old AV500. The BT HomeHub4 immediately got a DSL signal and broadband was back on.


I believe that TP-Link have a severe problem here. The configuration I am using is the obvious one for any typical setup.


Is this a known problem?


Is there a fix?

My guess as to why this occurs:
To me this appears to be a problem with the passthrough powerline sending noise to the BTHomeHub4 and so causing it to fail. The passthrough should not send noisy power to the devices connected to it, so the symptoms suggest to me that the design or the implementation are very poor.


I want the faster network to be able to access the router at the highest possible speed but there is not much use in that, if the router is compromised by the passthrough power.
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#1
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4 Reply
Re:AV1200 passthrough prevents BThomehub4 from getting broadband signal
2016-08-24 17:55:30
Try upgrading the firmware in the AV1200 units. Early releases weren't that good.

But then still, if your house wiring has the incoming phone wire too close to power lines (or even in the same sheath, which is poor practice for electrical wiring), then there may be interference to the point of failure. This is natural to how cabled data transmissions on unshielded wiring works.

If this is the case, your only fix is to rewire the incoming phone line using a shielded cable.
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#2
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Re:AV1200 passthrough prevents BThomehub4 from getting broadband signal
2016-08-24 19:29:31
Thanks, I think you are right: RF inteference of some sort is indeed the problem. I had not thought of the line-line interference. The phone and power cables are close together in places, though over short runs. However, a close run at high frequency presumably won't require much length to transmit between the cables? I assume, though that they have to be pretty close together?

My AV1200 units are new. Surely they'd have the latest firmware?
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#3
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Do I have a similar issue ?
2016-08-24 23:15:22
I recocnized that my router (different one : Fritz!Box 7490) does not start when it's ethernet is connected to the AV1200.
My guess is: There might be some power issues on the etherent cables.
Any Ideas ?
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#4
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Re:AV1200 passthrough prevents BThomehub4 from getting broadband signal
2016-08-25 00:28:00
I just tested the cabling and used a unshielded Cat6 coupler to interrupt the shielding connection on the ethernet cables. It came out, that my router could start as it should. So maybe you could give it a try ? Is here anybody on TP-LINK who can clarify ?
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