Call Security Interactions and Restrictions


Cisco Unified Communications Manager checks the phone security status when conferences are established and changes the security indication for the conference or blocks the completion of the call to maintain integrity and security in the system. The following table provides information about changes to call security levels when using Barge.



Initiators Phone Security Level


Call Security Level


Results of Action


Non-secure 


Encrypted call

 
Call barged and identified as non-secure call 


Secure (encrypted)


Authenticated call

 
Call barged and identified as authenticated call

 
Secure (authenticated)


Encrypted call


Call barged and identified as authenticated call


Nonsecure


Authenticated call


Call barged and identified as nonsecure call.


The following table provides information about changes to conference security levels depending on the  initiator’s phone security level, the security levels of participants, and the availability of secure conference bridges.



Initiators Phone Security Level



Feature Used


Security Level of Participants


Results of Action


Nonsecure



Conference


Encrypted or authenticated


Nonsecure conference bridge 


Nonsecure conference



Secure (encrypted or authenticated)



Conference


At least one member is non-secure.


Secure conference bridge 


Nonsecure conference


Secure (encrypted)



Conference


All participants are encrypted.


Secure conference bridge 


Secure encrypted level conference


Secure (authenticated)


Conference


All participants are encrypted or authenticated.



Secure conference bridge 


Secure authenticated level conference


Nonsecure


Conference


Encrypted or authenticated


Only secure conference bridge is available and used.


 Nonsecure conference



Secure (encrypted or authenticated)


Conference


Encrypted or authenticated


For Cisco Unified IP Phones 7962G and 7942G: 

  • Only non-secure conference bridge is available and used 
  • Nonsecure conference 


For Cisco Unified IP Phones 7961G and 7941G: 

  • Conference remains secure 
  • When one participant tries to Hold the call with Music on Hold (MOH), the MOH does not play.


Secure (encrypted or authenticated)


Conference


For Cisco Unified IP Phones 7962G and 7942G:

  • Encrypted or secure 


For Cisco Unified IP Phones 7961G and 7941G: 

  • Member puts call on Hold with MOH



For Cisco Unified IP Phones 7962G and 7942G: 

  • Conference remains secure. When one participant tries to hold the call with MOH, the MOH does not play. 


For Cisco Unified IP Phones 7961G and 7941G: 

  • No MOH is played 
  • Conference remains secure



Secure (encrypted)


Join


Encrypted or authenticated


Secure conference bridge 


Conference remains secure (encrypted or authenticated)



Nonsecure



cBarge


All participants are encrypted


Secure conference bridge 


Conference changes to non-secure



Nonsecure


Meet Me


Minimum security level is encrypted


Initiator receives message Does not meet Security Level and the call is rejected.



Secure (encrypted)


Meet Me


Minimum security level is authenticated



Secure conference bridge Conference accepts encrypted and authenticated calls



Secure (encrypted)


Meet Me


Minimum security level is
non-secure



Only secure conference bridge is available and used Conference accepts all calls