Cisco ASA 5505 Configuration Manual page 1040

Configuring Cisco Intercompany Media Engine Proxy
Note
In the Fallback area, configure the fallback timer for the Cisco Intercompany Media Engine by
Step 10
specifying the following settings:
a.
b.
c.
Note
Click Apply to save the configuration changes for the Cisco Intercompany Media Engine Proxy.
Step 11
Configuring the Cisco UC-IMC Proxy by using the Unified Communications
Wizard
To configure the Cisco Intercompany Media Engine Proxy by using ASDM, choose Wizards > Unified
Communications Wizard from the menu. The Unified Communications Wizard opens. From the first
page, select the Cisco Intercompany Media Engine Proxy option under the Business-to-Business section.
The wizard automatically creates the necessary TLS proxy, then guides you through creating the
Intercompany Media Engine proxy, importing and installing the required certificates, and finally enables
the SIP inspection for the Intercompany Media Engine traffic automatically.
The wizard guides you through these steps to create the Cisco Intercompany Media Engine Proxy:
Step 1 Select the Intercompany Media Engine Proxy option.
Step 2 Select the topology of the Cisco Intercompany Media Engine Proxy, namely whether the adaptive
security appliance is an edge firewall with all Internet traffic flowing through it or whether the adaptive
security appliance is off the path of the main Internet traffic (referred to as an off path deployment).
Specify private network settings such as the Cisco UCM IP addresses and the ticket settings.
Step 3
Cisco ASA 5500 Series Configuration Guide using ASDM
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In an off path deployment any existing adaptive security appliance that you have deployed in
your environment are not capable of transmitting Cisco Intercompany Media Engine traffic.
Off-path signaling requires that outside addresses are translated (using NAT) to an inside IP
address. The inside interface address can be used for this mapping service configuration. For the
Cisco Intercompany Media Engine Proxy, the adaptive security appliance creates dynamic
mappings for external addresses to the internal IP address.
In the Fallback Sensitivity File field, enter the path to a file in flash memory that the adaptive
security appliance uses for mid-call PSTN fallback. The file name that you enter must be the name
of a file on disk that includes the .fbs file extension. Alternatively, click the Browse Flash button to
locate and select the file from flash memory.
In the Call Quality Evaluation Interval field, enter a number between 10-600 (in milliseconds). This
number controls the frequency at which the adaptive security appliance samples the RTP packets
received from the Internet. The adaptive security appliance uses the data sample to determine if
fallback to the PSTN is needed for a call. By default, the length is 100 milliseconds for the timer.
In the Notification Interval field, enter a number between 10-360 (in seconds). This number controls
the amount of time that the adaptive security appliance waits before notifying Cisco UCM whether
to fall back to PSTN. By default, the length is 20 seconds for this timer.
When you change the fallback timer for the Cisco Intercompany Media Engine Proxy, ASDM
automatically removes the proxy from SIP inspection and then reapplies SIP inspection when
the proxy is re-enabled.
Chapter 47 Configuring Cisco Intercompany Media Engine Proxy
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