We have installed a UC540 at a client site and everything is working fine.
However, sometimes when the client plugs his Macbook into the network using an ethernet cable, it takes up to 25-50 seconds before the OS recognizes that it is plugged in and starts the DHCP process. If the cable is unplugged and replugged again, it will sometimes be recognized immediately and then get an IP address.
The client tried the Macbook at home and it worked normally - found connection and started DHCP immediately.
Is there anything on the UC540 that could be preventing the laptop from connecting immediately?