Linksys SPA921 Cisco Small Business IP Phone SPA9X1 Administration Guide - Page 81
Factory Reset, Password Protection, Managing the Time/Date, Daylight Saving Time
UPC - 745883570799
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System Administration Chapter 3 Managing Linksys IP Phones Factory Reset Factory reset resets all parameters to default value. The personal directory and call logs are also cleared. You must confirm this option before continuing. Password Protection You can configure a password on the phone to protect against access to the certain options. Managing the Time/Date The Linksys IP phone obtains the current time information in one of the following 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 SPA may contain a Date header with the current time information. If the header is present, the SPA uses it to update its current time. • Manual Setup-The Linksys IP phone also lets you manually enter the current time and date from the phone GUI or from the web page. However, this value is overridden by the NTP time or SIP Message Date whenever they are presented 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 parameter can be configured from the web page or through provisioning. This time can be further offset using the parameter, which must be entered in 24-hour format. This parameter can also be configured from the LCD display. The and offset values are not applied to the manual time/date setup. Daylight Saving Time The Linksys IP phone supports auto adjustment for daylight saving time. To enable this feature, the administrator must configure the parameter on the Regional tab. This parameter is a rule with three fields separated by semicolon (;) as shown below: start=;end=;save= Where: • and are of the form: //[/HH:[mm[:ss]]] • is of form: [/[+|-]HH:[mm[:ss]]] The value can be preceded by a negative (-) sign if subtraction is desired instead of addition. • = 1,2,12 (for Jan, Feb, Dec) • = [+|-]1,2,3,...,,31. If is 1, it means the on or before the end-of-the-month (in other words the last occurrence of < weekday> in that month). 3-38 Linksys IP Phone Administrator Guide Firmware Version 5.1