In order to enable the Music on hold feature on SPA9XX IP phones, complete these steps:
Using an SPA IP phone, press the Setup button.
Go to Network (9) using the Navigation button.
Select Current IP (2) will show the IP address of the SPA941.
Open a browser, enter "http://spa_ip_phone_ip_address" on the address bar and press [Enter] or click Go. The web-based utility should open as this window illustrates:
Click Admin Login on the upper right and go to advanced. Additional tabs will appear as shown here:
Go to EXT 1 tab and under Call Feature Settings, look for MOH Server. Enter "imusic" on the field, and click submit all changes as shown here: