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Admin Guide > Configuration > Managing ICE Gateway > Running an ICE Telephony Gateway using Non-TLS/SRTP > Enabling TLS/SRTP > Enabling CUCM Mixed-Mode Security
Enabling CUCM Mixed-Mode Security
In order to enable CUCM to accept calls both in secure and insecure mode, the admin needs to turn on the ‘mixed-mode’ flag in the CUCM via the command line interface.
To enable CUCM to operate in ‘mixed-mode’
1. Use Secure Shell (SSH) protocol to get in to the CUCM command line shell and apply the following command: admin:utils ctl set-cluster mixed-mode
2. CUCM prompts for confirmation:
This operation will set the cluster to Mixed mode. Do you want to continue? (y/n):
3. Press 'y' to continue and the following response should appear:
Moving Cluster to Mixed Mode
Cluster set to Mixed Mode
Please Restart Cisco Tftp, Cisco CallManager and Cisco CTIManager services on all nodes in the cluster that run these services.