Hi Jack,
These settings are found here;
service phone
To modify the vendorConfig parameters in the configuration file, use the service phone command in telephony-service or ephone-template configuration mode. To disable a setting, use the no form of this command.
service phone parameter-name parameter-value
no service phone parameter-name parameter-value
For example
displayOnTime HH:MM
Sets the time of day at which IP phone displays are activated, using a 24-hour time format.
•Hour (HH) and minute (MM). You must enter all four characters. For example, 9:05 a.m. must be entered as 09:05. Default is 07:30.
Note This parameter is not supported in ephone-template configuration mode.
http://www.cisco.com/en/US/docs/voice_ip_comm/cucme/command/reference/cme_s1ht.html#wp1092998
Hope this helps!
Rob
