Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility

Publisher

Cisco Systems

URL

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/cucm_b_feature-configuration-guide-for-15/cucm_mp_e8ed1830_00_extension-mobility-12-0.html

Published

2026-09-16

Updated

unknown

Accessed

2026-09-24

HTTP status

200

License

Cisco documentation; all rights reserved; no-redistribution; short excerpts and locators only

Source notes citing this source

• Extension Mobility requires the Cisco CallManager, Cisco Tftp and Cisco Extension Mobility services to be activated in Cisco Unified Serviceability. in context
• When the Allow Proxy service parameter is True, EM login and logout operations that pass through a web proxy are allowed. in context
• With Auto Logout selected, logging in to a second device, whether by Extension Mobility or Extension Mobility Cross Cluster, automatically logs the user out of the first device. in context
• Extension Mobility Cache Size (device cache kept by the EM service) defaults to 10000, with a minimum of 1000 and a maximum of 20000. in context
• EM works as usual with call display restrictions, but Ignore Presentation Indicators (internal calls only) must be checked in both the Device Profile and the Phone Configuration. in context
• The Change Credential IP phone service, which lets users change their PIN from the phone, uses http://server:8080/changecredential/ChangeCredentialServlet?device=#DEVICENAME# with an optional secure URL on port 8443. in context
• Cisco Extension Mobility lets users temporarily access their phone settings, such as line appearances, services and speed dials, from other phones within the Unified CM system. in context
• An Extension Mobility device profile acts as a virtual device that is mapped onto a physical phone when the user logs in. in context
• The phone itself must have the Enable Extension Mobility check box selected in its Phone Configuration window (Device > Phone). in context
• The Enforce Intra-cluster Maximum Login Time service parameter defaults to False; when set to True with a valid Intra-cluster Maximum Login Time, Unified CM automatically logs devices out after that duration. in context
• The EM troubleshooting headings give the same code, 207, to both 'Device Name Empty' and 'EM Service Connection Error' in both the Release 14 and Release 15 guides. in context
• The EM troubleshooting section lists login errors including Authentication Error (201), Blank User ID or PIN (202), User Profile Absent (205) and User Logged in Elsewhere (25). in context
• Hold reversion is listed as not supported with Cisco Extension Mobility. in context
• With Extension Mobility, an intercom line is presented only on the default device. in context
• If the user locale on the user or profile differs from the device locale, the phone restarts and then resets after a successful EM login. in context
• On a successful Extension Mobility login the phone automatically reconfigures itself with the user's device profile information. in context
• Users log out by pressing the Services button and choosing logout; if they do not, the system logs them out when service parameters are configured to do so, or the next user of the phone can log the previous user out. in context
• After an Extension Mobility logout, Unified CM sends the logout profile to the phone and restarts the phone. in context
• Maximum Concurrent Requests limits simultaneous EM login and logout operations to protect system resources, and its default is 5. in context
• Intra-cluster Maximum Login Time accepts values from 0:00 to 168:00 in HHH:MM format. in context
• When the login phone model does not match the user device profile, Unified CM copies the device-independent settings (user hold audio source, user locale, user ID, speed dials and directory number configuration, except the 'line setting for this device') from the profile to the phone. in context
• On a model mismatch, Unified CM applies the device profile default for the login phone's model for the phone button template, softkey template and, where supported, the add-on module. in context
• The default Intra-cluster Multiple Login Behavior is Multiple Logins Not Allowed, so a user can be logged in to only one device. in context
• Intra-cluster Multiple Login Behavior has three options: Multiple Logins Allowed, Multiple Logins Not Allowed, and Auto Logout. in context
• If a user has more than one user device profile, the user chooses which profile to use from a list at login; with a single profile the system uses it automatically. in context
• Extension Mobility requires a reachable TFTP server, and phone support must be checked in the phone documentation because EM extends to most but not all Cisco IP phones. in context
• The Extension Mobility IP phone service URL is http://<IP Address>:8080/emapp/EMAppServlet?device=#DEVICENAME#. in context
• Both the IP phones and the device profiles must be subscribed to the Extension Mobility service so that users can log in, use and log out. in context
• The Release 15 EM task flow runs in this order: generate a phone feature list; activate EM services; configure the EM phone service; create a device profile; associate the profile to the user; subscribe to EM; configure the Change Credential service; optionally configure EM service parameters. in context
• The Trusted List of IPs parameter takes trusted IP addresses or hostnames separated by semicolons, used with source IP validation of EM requests. in context
• Cisco Extension Mobility caches all logged-in user information for 2 minutes. in context
• In Unified CM Extension Mobility, a device profile is a virtual device that is mapped onto the physical phone when the user logs in. in context
• The Unified CM Intra-cluster Maximum Login Time service parameter uses the format HHH:MM with a range of 0:00 to 168:00. It logs users out automatically only when Enforce Intra-cluster Maximum Login Time is set to True. in context
• The Unified CM Intra-cluster Multiple Login Behavior parameter has three options: Multiple Logins Allowed, Multiple Logins Not Allowed (the default, where a second login fails with error 25), and Auto Logout. in context
• Unified CM Extension Mobility requires the Cisco Extension Mobility service to be activated in Serviceability and the phones to be subscribed to the Extension Mobility IP phone service. in context

Cite this source record

APA

WarmTransfer. (2026, September 16). Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility. WarmTransfer. https://warmtransfer.net/knowledge/sources/cisco-cucm-fcg-15-extension-mobility

BibTeX

@misc{warmtransfer-cisco-cucm-fcg-15-extension-mobility,
  title  = {Feature Configuration Guide for Cisco Unified Communications Manager, Release 15 and SUs - Extension Mobility},
  author = {{WarmTransfer}},
  year   = {2026},
  url    = {https://warmtransfer.net/knowledge/sources/cisco-cucm-fcg-15-extension-mobility},
  note   = {Cisco Systems, accessed 2026-09-24}
}