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  Information About Cisco Intercompany Media Engine Proxy
On successful verification, the terminating side creates a ticket that grants permission to the call 
originator to make a Cisco IME call to a specific number. See Tickets and Passwords, page 21-3 for 
information.
Figure 21-1 Interaction of the UC-IME Proxy with the PSTN
Tickets and Passwords
Cisco Intercompany Media...

 
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  Information About Cisco Intercompany Media Engine Proxy
Figure 21-2 Ticket Verification Process with Cisco Intercompany Media Engine
As illustrated in Figure 21-2. Enterprise B makes a PSTN call to enterprise A. That call completes 
successfully. Later, Enterprise B Cisco Intercompany Media Engine server initiates validation 
procedures with Enterprise A. These validation...

 
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  Information About Cisco Intercompany Media Engine Proxy
Call Fallback to the PSTN
Cisco Intercompany Media Engine provides features that manage the QoS on the Internet, such as the 
ability to monitor QoS of the RTP traffic in real-time and fallback to PSTN automatically if problems 
arise. Call fallback from Internet VoIP calls to the public switched telephone network (PSTN)...

 
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  Information About Cisco Intercompany Media Engine Proxy
Cisco Intercompany Media Engine (UC-IME) Bootstrap server—Provides a certificate required 
admission onto the public peer-to-peer network for Cisco Intercompany Media Engine. 
Figure 21-3 illustrates the components of the Cisco Intercompany Media Engine in a basic deployment. 
Figure 21-3 Cisco Intercompany Media Engine...

 
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Figure 21-4 Basic Deployment Scenario
Off Path Deployment
In an off path deployment, inbound and outbound Cisco Intercompany Media Engine calls pass through 
an adaptive security appliance enabled with the Cisco Intercompany Media Engine Proxy. The adaptive 
security appliance is located in the DMZ and is configured to...

 
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  Licensing for Cisco Intercompany Media Engine
Figure 21-5 Off Path Deployment of the Adaptive Security Appliance
Licensing for Cisco Intercompany Media Engine
The Cisco Intercompany Media Engine feature supported by the ASA require a Unified Communications 
Proxy license.
The following table shows the details of the Unified Communications Proxy license:
NoteThis feature is not...

 
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  Guidelines and Limitations
For more information about licensing, see Chapter 5, “Managing Feature Licenses for Cisco ASA 
Version 7.1,” in the general operations configuration guide.
Guidelines and Limitations
Context Mode Guidelines
Supported in single context mode only.
Firewall Mode Guidelines
Supported in routed firewall mode only.
IPv6 Guidelines
Does not support IPv6...

 
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  Guidelines and Limitations
Having Cisco UCMs on more than one of the ASA interfaces is not supported with the Cisco 
Intercompany Media Engine Proxy. Having the Cisco UCMs on one trusted interface is especially 
necessary in an off path deployment because the ASA requires that you specify the listening 
interface for the mapping service and the Cisco UCMs must be connected on...

 
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  Configuring Cisco Intercompany Media Engine Proxy
Configuring Cisco Intercompany Media Engine Proxy
This section contains the following topics:
Task Flow for Configuring Cisco Intercompany Media Engine, page 21-11
Configuring NAT for Cisco Intercompany Media Engine Proxy, page 21-12
Configuring PAT for the Cisco UCM Server, page 21-14
Creating ACLs for Cisco Intercompany Media...

 
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  Configuring Cisco Intercompany Media Engine Proxy
Or
Configure PAT for the UCM server. See Configuring PAT for the Cisco UCM Server, page 21-14. 
Step 2Create ACLs for Cisco Intercompany Media Engine Proxy. See Creating ACLs for Cisco Intercompany 
Media Engine Proxy, page 21-16.
Step 3Create the media termination address instance for Cisco Intercompany Media Engine Proxy. See...