Operation Manual
Configuring Regional Parameters and Supplementary Services
Localizing Your IP Phone
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 189
7
Managing the Time and Date 
Cisco IP phones obtain the time settings in one of three ways: 
• NTP Server—When the phone boots up, it tries to contact the first Network 
Time Protocol (NTP) server to get the time. The phone periodically 
synchronizes its time with the NTP server. The synchronization period is 
fixed at 1 hour. Between updates the phone tracks time with its internal clock. 
• SIP Messages—Each SIP message (request or response) sent to the phone 
could contain a Date header with the current time information. If the header 
is present, the phone uses it to set its clock. 
Time Zone  Selects the number of hours to add to GMT to generate the 
local time for caller ID generation. Choices are GMT-12:00, 
GMT-11:00,…, GMT, GMT+01:00, GMT+02:00, …, 
GMT+13:00.
Defaults to GMT-08:00.
Time Offset (HH/
mm)
Enter the offset from GMT to use for the local system time. 
Daylight Saving 
Time Rule 
Enter the rule for calculating daylight saving time. See 
Configuring Daylight Saving Time.
Daylight Saving 
Enable
Select yes to enable or no to disable DST on the phone. 
This setting affects all lines (extensions) on the phone.
Dictionary Server 
Script
Defines the location of the dictionary server, the languages 
available, and the associated dictionary. See Creating a 
Dictionary Server Script.
Language 
Selection
Specifies the default language. The value must match one 
of the languages supported by the dictionary server. The 
script (dx value) is:
<Language_Selection ua="na">
</Language_Selection>
Defaults to blank; the maximum number of characters is 
512. For example:
<Language_Selection ua="na"> Spanish
</Language_Selection>
Field Description
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