Cisco ASA 5505 Configuration Manual page 928

Licensing for Cisco Unified Communications Proxy Features
Model License Requirement
All models Intercompany Media Engine license.
When you enable the Intercompany Media Engine (IME) license, you can use TLS proxy sessions up
to the platform limit. If you also install the Unified Communications (UC) license, then the sessions
available for UC are also available for IME sessions. For example, if the platform limit is 1000 TLS
proxy sessions, and you purchase a 750-session UC license, then the first 250 IME sessions do not
affect the sessions available for UC. If you need more than 250 sessions for IME, then the remaining
750 sessions of the platform limit are used on a first-come, first-served basis by UC and IME.
The maximum number of IME sessions you can use depends on the TLS proxy session limit:
•
Note
You might also use SRTP encryption sessions for your connections:
•
•
Note
For more information about licensing, see
Cisco ASA 5500 Series Configuration Guide using ASDM
41-6
For a license part number ending in "K8", TLS proxy sessions are limited to 1000.
For a license part number ending in "K9", the TLS proxy limit depends on your configuration
and the platform model. To configure the TLS proxy limit, use the Configuration > Firewall >
Unified Communications > TLS Proxy pane.K8 and K9 refer to whether the license is
restricted for export: K8 is unrestricted, and K9 is restricted.
For a K8 license, SRTP sessions are limited to 250.
For a K9 license, there is not limit.
Only calls that require encryption/decryption for media are counted towards the SRTP limit;
if passthrough is set for the call, even if both legs are SRTP, they do not count towards the limit.
Chapter 41 Information About Cisco Unified Communications Proxy Features
Chapter 4, "Managing Feature Licenses."
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