http://www.freebsd.org/doc/en/books/handbook/serialconsole-set up.html

[Warren Block]

On Tue, 25 Jun 2013, Mark Felder wrote:

> On Tue, Jun 25, 2013, at 11:23, Stephen Burke wrote:
>> Does anyone know how I could push serial output to an IP port that I
>> could SSH to?
>>
>
> You want something like a Portmaster or Lantronix device that will
> provide serial consoles over SSH
>
> http://www.lantronix.com/device-networking/external-device-servers/

Or a small computer like a netbook running sshd with a USB to serial 
adapter and cu(1).

If you had two systems located near each other in a data center, each 
could act as the SSH serial console terminal for the other.