Detail overview
  brocade - Fastiron Edge X (fesx448-prem) 48-ports Rack Mountable Switch Managed- Rack-mountable (fesx448-prem). 
key Features : 
  Device Type : Switch - 48 Ports - L3 - Managed 
   Enclosure Type : Rack-mountable - 1.5u 
   Ports : 48 X 10/100/1000 + 4 X Sfp 
   Power Over Ethernet (poe) : Yes 
   Mac Address Table Size : 16k Entries 
   Max Units In A Stack : 8 
   Encryption Algorithm : Aes 
expansion / Connectivity : 
   Interfaces : 
   48 X 10base-t/100base-tx/1000base-t - Rj-45 - Poe 
   1 X Console - 9 Pin D-sub (db-9) - Management 
   1 X Ethernet - Rj-45 - Management 
power : 
   Power Device : Power Supply - Hot-plug / Redundant - Plug-in Module 
   Installed Qty : 1 (installed) / 2 (max) 
   Power Redundancy : Optional 
   Power Redundancy Scheme : 1+1 (with Optional Power Supply) 
   Voltage Required : Ac 120/230 V ( 50/60 Hz )