Managing The Time And Date; Configuring Daylight Savings Time; Localizing Your Ip Phone - Cisco SPA942 - - IP Phone Administration Manual

Configuring Regional Parameters and Supplementary Services

Localizing Your IP Phone

Cisco SPA and Wireless IP Administration Phone Guide

Managing the Time and Date

Cisco IP phones obtain the current time information in one of three ways:
• NTP Server—You can configure one or two NTP servers on the phone.
When the phone first boots up, it tries to contact the first NTP server to get
the current time. The phone periodically synchronizes its time with the NTP
server. The synchronization period is fixed at 1 hour. In between updates,
the phone tracks time with its own internal clock.
• SIP Messages—Each SIP message (request or response) sent to the phone
may contain a Date header with the current time information. If the header is
present, the phone uses it to update its current time.
• Manual Setup—The phone also lets you manually enter the current time and
date from the phone GUI or the web UI. However, this value is overridden by
the NTP time or SIP Message Date whenever they are available to the
phone. Manual setup requires you to 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 from the web page or through
provisioning. This time can be further offset by the
parameter, which must be entered in 24-hour format. This parameter can also be
configured from the phone's LCD display.

Configuring Daylight Savings Time

The phone supports auto adjustment for daylight saving time. You must set
Daylight Savings Time Enable
CallerID
time stamp on
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
Time Zone
NOTE: The
mm)
offset values are
time and date setup.
to yes and enter the DST rule. This option affects the
.
Time Offset (HH/mm
Time Offset (HH/
and
not
applied to manual
8
)
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