[rescue] Sun Netra 240 w/ 48V Power Supplies- How much current do I need to run it?

[PhreakShow Telephone Company]

I picked up a Sun Netra 240 at U of M surplus for a whopping 5 dollars.

However to run it,  I need to supply it with 48v power.   It came out
of a telco central office.   Any idea how big of PSU i need to run it?

Thanks