Extension Mobility allows users to temporarily access their phone settings, such as line appearances, services, and speed dials, from other phones within your system. I am not explaining the steps how to enable this feature, because its already covered by many on the internet by both videos and documents.
This blog is all about the login options, From CUCM 12.0 Cisco introduced different login option for extension mobility. The below mentioned are the available options.
loginType=DNenables users to sign in using Primary Extension and PIN.loginType=SPenables users to sign in using Self Service User ID and PIN.loginType=UIDenables users to sign in using User ID and PIN.
Cisco Extension Mobility Phone Service
The default service url we configure for extension mobility is
http://<IP Address>:8080/emapp/EMAppServlet?device=#DEVICENAME#.
IP Address is the IP address of the Unified Communications Manager where Cisco Extension Mobility is activated and running.
This format allows a user to sign-in using User ID and PIN. From CUCM 12.0 by appending the loginType parameter to the Service URL, we can have more sign-in options.
service Urls
Use the appropriate service url based on your requirement.
loginType=DNenables users to sign in using Primary Extension and PIN. The Service URL format is:http://<IP Address>:8080/emapp/EMAppServlet?device=#DEVICENAME#&loginType=DN.loginType=SPenables users to sign in using Self Service User ID and PIN. The Service URL format is:http://<IP Address>:8080/emapp/EMAppServlet?device=#DEVICENAME#&loginType=SP.loginType=UIDenables users to sign in using User ID and PIN. The Service URL format is:http://<IP Address>:8080/emapp/EMAppServlet?device=#DEVICENAME#&loginType=UID.
Note:- If you do not append loginType to the end of the URL, the default sign-in option displayed is User ID and PIN.