Specifications

Setting Up Cisco Unified IP Phones

How to Set Up Cisco Unified IP Phones

Cisco Unified Survivable Remote Site Telephony Version 4.0 System Administrator Guide

How to Set Up Cisco Unified IP Phones

This section contains the following tasks:

• Configuring IP Phone Clock, Date, and Time Formats, page 52 (Optional)

• Configuring IP Phone Language Display, page 53 (Optional)

• Configuring Customized System Messages for Cisco Unified IP Phones, page 55 (Optional)

• Configuring a Secondary Dial Tone, page 57 (Optional)

• Configuring Dual-Line Phones, page 58 (Required Under Certain Conditions)

Configuring IP Phone Clock, Date, and Time Formats

The Cisco Unified IP Phone 7970G and Cisco Unified IP Phone 7971G-GE IP phones obtain the correct

timezone from Cisco Unified CallManager. They also receive the Coordinated Universal Time (UTC)

time from the SRST router during SRST registration. When in SRST mode, the phones take the timezone

and the UTC time, and apply a timezone offset to produce the correct time display.

Cisco IP Phone 7960 IP phones and other similar SCCP phones such as the Cisco IP Phone7940, get their

display clock information from the local time of the SRST router during SRST registration. If the

Cisco Unified SRST router is configured to use the Network Time Protocol (NTP) to automatically sync

the Cisco Unified SRST router time from an NTP time server, only UTC time is delivered to the router.

This is because the NTP server could be physically located anywhere in the world, in any timezone. As

it is important to display the correct local time, use the clock timezone command to adjust or offset the

Cisco Unified SRST router time.

The date and time formats that appear on the displays of all Cisco Unified IP Phones in Cisco Unified

CallManager fallback mode are selected using the date-format and time-format commands as

configured below:

SUMMARY STEPS

1. clock timezone zone hours-offset [minutes-offset]

2. call-manager-fallback

3. date-format {mm-dd-yy | dd-mm-yy | yy-dd-mm | yy-mm-dd}

4. time-format {12 | 24}

5. exit