### What’s Different?

- 9600 Series IP Telephones do not support existing HIP and HIC headset cords.
- The CTI protocol is no longer supported for use with IP Softphone.
- 9600 Series IP Telephones do not support DHCP options 43 and 66. Option 176 can be used as the site-specific option, but you would have to manually program that SSON into each telephone.
- Only a subset of parameters can be set in the DHCP site-specific option. Other parameters must be set in a 46xxsettings.txt configuration file.