[cisco-voip] Make a phone reacquire settings from dhcp

[Anthony Kouloglou]

i have several 7940 and 7941G-GE phones that use a dhcp server 
configured on an IOS gateway.
I have changed the domain-name option at the dhcp but i cannot force the 
phone to reacquire the new setting.
I have tried resetting the phone, restarting the phone and releasing the 
IP address but nothing is happening!! It keeps the old setting!!
Can someone help with that?

Thanks
akoul