[ale] Need an Ethernet cutoff relay

[Alex Carver]

Yeah, it's just a waste because I'd have one switch per camera so that's
a lot of hardware going unused.  And the switch would have to provide
POE on its own or I'd have to get injectors adding to the mess. :)

On 2021-07-29 07:26, Phil Turmel via Ale wrote:
> If you can't find anything else, consider a small brainless unmanaged
> POE switch and kill its power.
> 
> On 7/26/21 2:18 PM, Alex Carver via Ale wrote:
>> I've been searching for over a week now with no luck.
>>
>> What I'm looking for is a small-ish (DIN rail mount would be ideal)
>> relay device that accepts a signal and will completely cut off all four
>> pairs of an Ethernet connection.   It should at least be shielded (so no
>> cheap switch boxes from Amazon adorned with Brother P-Touch labels,
>> those are also manual push buttons :) ).
>>
>> Some of the closest I've gotten are A/B switches but they're in desktop
>> cases and are just too big.
>>
>> Purpose:
>> I am going to be installing a VoIP door station to replace the doorbell
>> button. It's a PoE unit so I do need all the pairs. It has several
>> additional I/O and power ports for various uses, one of which provides a
>> steady 12 VDC when the unit is up. I plan to link this to a latching
>> relay in such a way that if the 12 VDC suddenly disappears (e.g. someone
>> took a baseball bat and adjusted the camera angle), it will break the
>> Ethernet lines to the exposed patch cable making it a dead cable which a
>> computer can't use.
>>
>> The box itself doesn't need the latching relay, it just needs a simple
>> relay that is either on or off with the application of signal.  I'll
>> take care of the latching part separately with other external relays.
>>
>> I just can't seem to find anything like this.  Just for fun I tried an
>> industrial PoE injector that I had handy which takes 24 VDC in but the
>> data lines are passed right through the unit so even with it off it
>> doesn't stop the drop from working as a minimum 10/100 (two pair) port.
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> 
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