Configuring Regional Parameters and Supplementary Services
Localizing Your IP Phone
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide
209
7
•
Manual Setup—The time and date can be entered manually by using the IP
phone screen or the phone web user interface. However, this value is
overwritten by the NTP time or SIP Message Date whenever they are
available to the phone. Manual setup requires that you enter the time in
24-hour format only.
The time served by the NTP Server and the SIP Date Header are expressed in
GMT time. The local time is obtained by offsetting the GMT according to the time
zone of the region.
The
Time Zone
parameter can be configured by using the phone web user
interface or through provisioning. This time can be further offset by the
Time
Offset (HH/mm
) parameter. This parameter must be entered in 24-hour format and
can also be configured from the IP phone screen.
The
Time Zone
and
Time Offset (HH/mm)
offset values are
not
applied to manual
time and date setup.
Configuring Daylight Saving Time
The phone supports auto adjustment for daylight saving time. You must set
Daylight Savings Time Enable
to yes and enter the DST rule. This option affects the
time stamp on the
CallerID
.
To enter the rule for calculating DST, include the start, end, and save values
separated by semi-colons (;) as follows:
Start =
start-time
; end=
end-time
; save =
save-time
For example, the default DST rule is:
start=4/1/7;end=10/-1/7;save=1.
The
start-time
and
end-time
values specify the start and end dates and times of
daylight saving time. The format is:
month/day/weekday[/HH:mm:ss]
The
month
value equals any value in the range 1-12 (January-December).
The
day
value equals any + or - value in the range 1-31. If value is -1, the time will
change on the weekday on or before the end of the month; the last occurrence of a
weekday in that month.