You have Recieved the unused equipment U1960/1930. After setting the IP address of your laptop to the same subnet with Ip Pbx and making sure that cable connectivity is alright, you still didnt able to ping the default IP of the Pbx.
Connect Serial Console Cable with your laptop and connect other part of the cable to the Console port of Ip Pbx. Login into IP Pbx configuration Mode and configure the IP address according to the actual requirements as below.
config system ip mode static address x.x.x.x/x
config system gateway ip x.x.x.x
By Default, DHCP has been enabled in U1960/1930 so every time you try to ping, its unsuccesfull.
Restart the Device to let the settings take Effect.