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18-3
Cisco ASA Series Firewall ASDM Configuration Guide
Chapter 18 Configuring the TLS Proxy for Encrypted Voice Inspection
Information about the TLS Proxy for Encrypted Voice Inspection
proxy, the CTL file must contain the certificate that the security appliance creates for the Cisco UCMs.
To proxy calls on behalf of the Cisco IP Phone, the security appliance presents a certificate that the Cisco
UCM can verify, which is a Local Dynamic Certificate for the phone, issued by the certificate authority
on the security appliance.
TLS proxy is supported by the Cisco Unified CallManager Release 5.1 and later. You should be familiar
with the security features of the Cisco UCM. For background and detailed description of Cisco UCM
security, see the Cisco Unified CallManager document:
http://www.cisco.com/univercd/cc/td/doc/product/voice/c_callmg/5_0/sec_vir/ae/sec504/index.htm
TLS proxy applies to the encryption layer and must be configured with an application layer protocol
inspection. You should be familiar with the inspection features on the ASA, especially Skinny and SIP
inspection.
Supported Cisco UCM and IP Phones for the TLS Proxy
Cisco Unified Communications Manager
The following releases of the Cisco Unified Communications Manager are supported with the TLS
proxy:
• Cisco Unified CallManager Version 4.x
• Cisco Unified CallManager Version 5.0
• Cisco Unified CallManager Version 5.1
• Cisco Unified Communications Manager 6.1
• Cisco Unified Communications Manager 7.0
• Cisco Unified Communications Manager 8.0
Cisco Unified IP Phones
The following IP phones in the Cisco Unified IP Phones 7900 Series are supported with the TLS proxy:
• Cisco Unified IP Phone 7985
• Cisco Unified IP Phone 7975
• Cisco Unified IP Phone 7971
• Cisco Unified IP Phone 7970
• Cisco Unified IP Phone 7965
• Cisco Unified IP Phone 7962
• Cisco Unified IP Phone 7961
• Cisco Unified IP Phone 7961G-GE
• Cisco Unified IP Phone 7960
• Cisco Unified IP Phone 7945
• Cisco Unified IP Phone 7942
• Cisco Unified IP Phone 7941
• Cisco Unified IP Phone 7941G-GE
• Cisco Unified IP Phone 7940
• Cisco Unified Wireless IP Phone 7921