[cisco-voip] CCM 3.3 Configuration Question

[Troy Davis]

Try changing the DHCP server to reply with option 150, set to the
CallManager/TFTP server's IP address.  If an IOS device does DHCP, use:

ip dhcp pool voice_pool
 option 150 ip 192.168.1.18

To use a hostname instead of an IP, set option 66 instead of 150 (and make
sure you're serving valid nameserver IPs).
http://www.cisco.com/en/US/products/hw/modules/ps2797/products_tech_note09186a0080093fbe.shtml
may help.

Troy