How does switch register connected device???

[stoyanoff]

I want to know what must find a switch to register a connected device? Should it must be just a resistence between 2 of the pins or there must be some information transfer??? I`m creating a device with tcp/ip comunication, but my switch doesn`t find anything connected to if. The led stays off.
Thanks!

 

[vinoth8051]

Hi stoyanoff,
what device you wish to identify, are you using microcontroller or pc to interface a device?

 

[stoyanoff]

It`s microcontroller. When I connect the pcb to switch the light doesn`t turn on. So I want to know if the switch needs only physical connection, this means I have error in the hardware.

 

[vinoth8051]

Hi
still i am in bit confusion...
are you working with this switch
or with this mechanical switch.
If first is your option, mere connect a board to switch may not blink the LEDs in Ethernet port. Software handshaking protocol has to be implemented.

 

[stoyanoff]

I`m working with LAN switch!!! I want to know on with pins (1,2,3 or 6) I must have voltage so the switch to register a connected device? Is it posible just to connect 3.3V to any pin and the switch to register a connected device(to turn on the led on the port)???

 

[vinoth8051]

Hi,
I am not pretty sure that, without software handshaking, blinking the led of ethernet port would be possible.