Common Device Configuration

CUCM Configuration

Cisco Unified Communications Manager (CUCM) 5.0 introduced the common device configuration elements which provide a pool of configuration elements that can be assigned to multiple devices. The functionality of the configurations is similar to the operation of a device pool in CUCM. To change a configuration element among a pool of 500 devices, only the common device configuration needs to be changed. The Common Device Configuration includes the following configuration parameters: •Softkey Template •User Hold MOH Audio Source •Network Hold MOH Audio Source •User Locale •Use Trusted Relay Point •MLPP Indication •MLPP Preemption •MLPP Domain Softkey templates control the type and order of softkeys displayed on the IP phone for many different call states. Softkey configuration has been covered in detail in previous blogs. Softkeys was a device pool configurable parameter in Call Manager 4.x, but it was removed from the device pool configuration in later versions of CUCM. The user hold MOH audio source controls the music on hold file that the music on hold component of the IP Voice Media Streaming Application streams to the held party. The network hold MOH audio source is the MOH file that users will hear when they get temporarily put on hold for a supplementary services action (e.g. transfer, conference, park). User locale controls the language that the user will see on the Cisco IP phone. Use Trusted Relay Point leverages a Media Termination Point (MTP) to perform virtual route forwarding (VRF) routing without allowing direct connectivity to different IP subnets that are in different VRFs. Instead of communicating directly through IP routing, devices communicate through a MTP on the network. The trusted relay point is used when there is a requirement in the network that disallows communication between the data and voice network when software based phones are used. Cisco IP Communicator (CIPC) and Cisco Unified Personal Communicator (CUPC) are two of the available Cisco software based phones. I have included a link to a good Cisco document if you care to learn more about trusted relay points. MLPP (Multilevel Precedence and Preemption) is a military standard that allows priority levels to be associated to phone calls. Higher priority calls can preempt lower priority calls if there is contention for resources. MLPP is widely used by the military in battle fields where there is very high contention for resources where high priority calls by senior brass are a matter of life or death. I have included a link that discusses the MLPP features in detail. The common device configuration can be found in the Device > Device Settings menu of Cisco Unified Communications Manager administration (/ccmadmin). Links Virtual Route Forwarding Design Guide Secure Softphone Connectivity http://www.cisco.com/en/US/docs/voice_ip_comm/cucme/vrf/design/guide/softPhones.html Multilevel Precedence and Preemption http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/4_0_1/ccmfeat/fsmlpp.html

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