Hello. I am considering purchasing a couple of CRS112-8G-4S-IN to provide power to some equipment over POE-OUT at a remote site.
The web page states that "CRS112-8P-4S-IN can power 802.3af/at devices if 48-57 V DC input is used (unit will automatically detect and provide correct power to devices)". My first question is: If a 48V-57V power supply is used, can some of the ports provide 48V and others 24V? An I interpreting the web page correctly?
I know that with other models that have two DC inputs (DC in and POE in for example), that both can be plugged in at the same, and the higher voltage is used by the unit. In this way an effective yet simple fail-over can be achieved.
My second question is: Can both of the DC inputs on the CRS112-8G-4S-IN be used simultaneously for failover? Specifically I would like to use the 48V power supply plugged into the electrical AC supply, and plug the other DC input into an 18V battery bank. All of the equipment that will plug into the POE OUT ports of this switch functions at 18V, but ideally all of it can use 24V and some can use 48V.
Thanks for any insights