Follow below Steps for expansion module:
Step 1 Log in to Cisco Unified Communications Manager Administration.
Cisco Unified Communications Manager Administration window displays.
Step 2 From the menu, choose Device > Phone.
The Find and List Phone page appears. You can search for one or more phones that you want to configure for the Cisco Unified IP Phone Expansion Module.
Step 3 Select and enter your search criteria and click Find.
The Find and List Phone window displays showing a list of the phones that match your search criteria.
Step 4 Click the IP Phone that you want to configure for the Cisco Unified IP Phone Expansion Module.
The Phone Configuration window displays.
Step 5 Scroll to the Expansion Module Information section.
Step 6 To add support for one expansion module on Cisco Unified IP Phones 7961G and 7961G-GE, in the Module 1 field, select 7914 14-Button Line Expansion Module.
To add support for one expansion module on Cisco Unified IP Phone 7962G, in the Module 1 field, choose 7914 14-Button Line Expansion Module for the Cisco Unified IP Phone Expansion Module 7914, 7915 12-Button Line Expansion Module or 7915 24-Button Line Expansion Module for the Cisco Unified IP Phone Expansion Module 7915, or 7916 12-Button Line Expansion Module or7916 .24-Button Line Expansion Module for the Cisco Unified IP Phone Expansion Module 7916.
Step 7 To add support for a second expansion module on Cisco Unified IP Phones 7961G and 7961G-GE, in the Module 2 field, choose7914 14-Button Line Expansion Module.
To add support for a second expansion module on Cisco Unified IP Phone 7962G, in the Module 2 field, choose 7914 14-Button Line Expansion Module for the Cisco Unified IP Phone Expansion Modules 7914, 7915 12-Button Line Expansion Module or 7915 24-Button Line Expansion Module for the Cisco Unified IP Phone Expansion Module 7915, or 7916 12-Button Line Expansion Module or7916 24-Button Line Expansion Module for the Cisco Unified IP Phone Expansion Module 7916.
To configure the expansion module 7914 these buttons as line or speed dials, use Phone Button Template Configuration.
use the link for configuring phone template:
http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/7_0_1/ccmcfg/b06phtmp.html#wpxref53132