How to add Cisco Expansion Module 7916 on Cisco IP phone 7965

Step 1. H/w Install with proper steps.

1.1 Power code

Case#1 : IP phone (POE) + Single Cisco 7916 module(Power supply) : Cisco 7916 module requires power supply.
Case#2: IP phone (POE) + First Cisco 7916 modules(Power supply) + Second Cisco 7961 module(No power supply) : First Cisco 7916 module requires only dedicated power supply.
Case#3: IP phone (Power Supply) +  Single Cisco 7916 module(No power supply) : no power supply is needed for Cisco 7916 module
Case#4: IP phone (Power Supply) + First Cisco 7916 modules(Power supply) + Second Cisco 7961 module(No power supply) : First Cisco 7916 module requires only dedicated power supply.

Step 2. Download proper s/w for 7916 and save a specific location for tftp setup.

ex) B016-1-0-4.SBN

Router# mkdir phone
Router# cd phone <- Creating a folder under flash0:
Router# mkdir 7916 <- Creating a folder uner phone folder

Copy B016-1-0-4.SBN to flash0:/phone/7916

Step 3. Configure s/w load

Router(config)# telephony-service
Router(config-telephony)# load 7916-12 B016-1-0-4

Step 4. Configure Tftp

Router(config)# tftp-server flash0:/phone/7916/B016-1-0-4.SBN alias B016-1-0-4

Step 5. Add below configurations that Router can to recognize

Router(config)# ephone 10
Router(config-ephone)# type 7965 addon 1 7916-12 <– Installing single Cisco 7916 module

or

Router(config-ephone)# type 7965 addon 1 7916-12 2 7916-12 <– Installing two Cisco 7916 modules
Router(config-ephone)# restart <– Applying new configuration

* Patient, IP phone booting time would be longer than regular phone without Cisco 7916 module

Step 6. Adding speed

Router(config)# ephone 10
Router(config-ephone)#speed-dial 1 1111
Router(config-ephone)#speed-dial 2 1112
Router(config-ephone)#speed-dial 3 1113
Router(config-ephone)#speed-dial 4 1114
Router(config-ephone)#speed-dial 5 1115
Router(config-ephone)#speed-dial 6 1116
Router(config-ephone)#speed-dial 7 1117

Step 7. Troubleshooting

A. All buttons are amber light on : Check Step 2 is completed.

Ref. http://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/cuipph/7916/english/16enug.pdf