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Cisco Unified IP Phone 7900 Series

Field Notice: FN - 62878 - New Zealand Daylight Saving Time Policy Changes Effective September 2007 - For Cisco Unified IP Phones


September 7, 2007

NOTICE:

THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTY OF MERCHANTABILITY. YOUR USE OF THE INFORMATION ON THE FIELD NOTICE OR MATERIALS LINKED FROM THE FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.


Products Affected

Products Affected

7906 - CP-7906G

7911 - CP-7911G

7931 - CP-7931G

7941 - CP-7941G

7941GE - CP-7941G-GE

7961 - CP-7961G

7961GE - CP-7961G-GE

7970 - CP-7970G

7971 - CP-7971G-GE

  

Problem Description

The operating systems of most Cisco products that support Daylight Saving Time (DST) have built-in mechanisms to automatically change the times, based on current user-selected rules. Once the new DST is implemented, the time on devices that maintain time zone information will continue to change according to the old method, unless changes are made.

Background

On April 30, 2007, the Minister of Internal Affairs issued a statement regarding a change in Daylight Saving Time policy for New Zealand. The change in policy has modified the start and end dates for Daylight Saving Time (DST). Beginning in 2007 and beyond, Daylight Saving Time in New Zealand will start on the last Sunday of September at 2:00 A.M. local time and end on the first Sunday of April at 3:00 A.M. local time.

Specifically for 2007-2008, Daylight Saving Time will begin at 2:00 A.M. local time on September 30, 2007, and end at 3:00 A.M. local time on April 6, 2008.

For more information, see the statement issued by the Minister of Internal Affairs: Daylight saving to be extended.

The old Daylight Saving Time policy dictated that DST started on the first Sunday in October and ended on the third Sunday in March.

On April 30, 2007, Hon Rick Barker, Minister of Internal Affairs, announced a three week extension to the period of daylight saving. Daylight saving now runs from the last Sunday in September until the first Sunday in April.

Table 1 - Summary of changes to Daylight Saving Time

Event

Prior to 2007

Year 2007 and After

Start

First Sunday in October

2:00 A.M. on September 30, 2007

(Last Sunday in September)

End

Third Sunday in March

3:00 A.M.on April 6, 2008

(First Sunday in April)

  

Problem Symptoms

The potential problem is that the system time and all timestamps will be incorrect by an hour for three weeks in the spring and one week in the fall for the year of 2007 and beyond, unless the steps described in this notice are taken.

This can have a major impact on any event correlation activities that are performed as part of normal operations, troubleshooting, and monitoring.

For example, applications where logs may be captured, correlated, and stored could be rendered incorrect for situations where they need to be recalled to rebuild a sequence of events. The incorrect timestamps may not be an issue for events that get immediate action, but future reference back to these events would reference incorrect times.

In addition, any device with time based controls and activities, such as authentication servers, synchronization activities, and scheduled events such as batch jobs, timed backups or automated scripts would be impacted.

Workaround/Solution

To comply with this government mandate, Cisco has begun to take the necessary steps to conform to the new New Zealand Daylight Savings Time standard that will begin in September 2007.

The intent of this document is to inform Cisco customers of the plan that Cisco is preparing in order to bring the Unified Communications applications and associated platforms into compliance with this new government mandate.

Cisco Unified IP Phone Models

Action

Cisco Unified IP Phone 7902G 7905G 7912G (SCCP)

Time information comes from Cisco Unified CallManager / CallManager Express. Update CallManager or CallManager Express to correct the new DST dates.

Cisco Unified IP Phone 7905G 7912G (SIP)

No support. Customer may manually adjust TimeZone parameter. Menu >> Settings >> Network Configuration >> Time Zone

Time Zone configuration

Cisco Unified IP Phone models 7906G, 7911G, 7931G, 7941G, 7941G-GE, 7961G, 7961G-GE, 7970G, and 7971G-GE (SCCP and SIP)

New DST rules are present in the following phone firmware releases: 8.3(1) ES1. Customers must contact CIsco TAC to obtain this Engineering Special firmware load. The released IP Phone Firmware, 8.3(2)SR1, will be available by September 7, 2007 8.3(2)SR1 firmware will be available on the Software Download (registered customers only) page.

Cisco Unified IP Phone models 7910G, 7910G+SW, 7940G and 7960G (SCCP)

Time information comes from Cisco Unified CallManager / CallManager Express. Update CallManager or CallManager Express to correct the new DST dates.

Cisco Unified IP Phone models 7940G and 7960G (SIP and MGCP)

No new firmware image needed; DST change will be accomplished by a configuration change made by the customer. See the appropriate Administration Guide for configuration instructions by clicking on either the SIP or MGCP link below.

SIP

MGCP

Cisco Unified IP Phone models 7920, 7921, 7935, 7936 and 7985G (SCCP only - no SIP loads)

Time information comes from Cisco Unified CallManager / CallManager Express. Update CallManager or CallManager Express to correct the new DST dates.

  

Important Note

For instructions on DST upgrades needed for the Cisco Unified Communications Manager, refer to:

Field Notice: FN - 62883 - New Zealand Daylight Savings Time Policy Changes Effective September 2007 - for Cisco Unified CallManager.

For instructions on DST upgrades needed for Cisco Unity, refer to:

Field Notice: Field Notice: FN - 62868 - New Zealand Daylight Savings Time Policy Changes Effective September 2007 For Cisco Unity.

DDTS

To follow the bug ID link below and see detailed bug information, you must be a registered user and you must be logged in.

DDTS

Description

CSCsj58806 (registered customers only)

TNP Phone Update needed for New Zealand DST changes in 2007

CSCsj15453 (registered customers only)

DST time change for SIP 7940/7960 phones (Energy Policy Act '05)

  

Revision History

Revision

Date

Comment

1.0

07-SEP-2007

Initial Public Release

  

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:

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