Cisco Cisco AnyConnect Secure Mobility Client v2.x Troubleshooting Guide

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Cisco Unified Communications Manager (CUCM) that is used as a voice server.
  
For configuration examples of AnyConnect with VPN phones, refer to these documents:
  
  
Requirements
  
Before you deploy SSL VPN with IP phones, confirm that you have met these initial requirements
for AnyConnect licenses for the ASA and for the U.S. export restricted version of the CUCM.
  
Confirm VPN Phone License on ASA
  
The VPN phone license enables the feature in the ASA. In order to confirm the number of users
that can connect with the AnyConnect (whether or not it is an IP phone), check the AnyConnect
Premium SSL License. Refer to 
 for further details.
  
On the ASA, use the show version command in order to check if the feature is enabled. The
license name differs with the ASA release:
  
ASA Release 8.0.x: license name is AnyConnect for Linksys Phone.
ASA Release 8.2.x and later: license name is AnyConnect for Cisco VPN Phone.
  
Here is an example for ASA Release 8.0.x:
  
ASA5505(config)# show ver
Cisco Adaptive Security Appliance Software Version 8.0(5)
Device Manager Version 7.0(2)