HELLO MY FRIEND my boss want to screen lock to 8945&7821 IP phone,for Example I want to make a call form any phone  in our  company i can not dial any number before i inter a personal password to unlock the phone and dial , I want to buy (25) 7821 I...

hi i have  downloaded Microsoft Network Monitor 3.4 program and I've noticed Strange movement in the network . my network device conncet with dis IP (224.0.0.251). What is this IP and what he was doing in my network i allredy have a (DNS server) i u...

hi   i have this alart ( The last synchronization attempt on 2015-Nov-15 00:30:34 failed because the instance was unreachable. The last successful synchronization with this instance was 2015-Nov-08 00:31:04.)   in (Cisco PrimeLicense Manager) whin i ...