====== Mobile Voice Access ======
  * MVA allows users to call into the enterprise from any phone and place outgoing calls that appear to come from their office phone
  * Originate enterprise calls from any remote destination by:
    * Dialing to the enterprise MVA number
    * Entering ID (if required) and PIN
    * Entering destination number to be called
  * Called party sees the office phone number as the calling party
  * Switch active calls between office and remote phone
{{cucm-mva1.png|}}

===== Requirements =====
  * H.323 or SIP gateway providing Mobile Voice Access IVR application
  * Out-of-band DTMF
  * Remote destination must be external devices

===== CSS =====
  * When calling into MVA, the CSS on the line and the CSS on the Remote Destination Profile are combined to determine the effective user CSS.
  * New in CUCMv7, there is a new CUCM service paraemter that determines the CSS for MVA calls: **Inbound CSS for Remote Destination**
    * This can be set to the trunk or gateway inbound CSS (Default)
    * Or the Remote Destination Profile + Line CSS (same behaviour in CUCMv6 handling).
{{cucm-mobc3.png|}}

===== Configuration =====

==== CUCM MVA Service ====
  * Activate the Cisco Unified Mobile Voice Access Service
  * Under **CCMService > Tools > Service Activation**
{{cucm-mva4.png|}}

==== CUCM Service Parameters ====
  * Under **System > Service Parameters > Cisco CallManager**
  * Enable MVA globally
  * Enable and configure enterprise feature access
    * Allow remote device to use various code to trigger various call function such as hold, transfer, resume --- etc.
  * Configure MVA number 2999, this is what get pass to the VXML script on the router.  
{{cucm-mva5.png|}}

==== CUCM End User ====
  * Under **User Management > User**
  * Enable MVA per end user
{{cucm-mva6.png|}}

==== CUCM MVA Media Resource ====
  * Under **Media Resource > Mobile Voice Access**
  * Configure MVA media resource
  * The mobile voice access directory number must match what was configured on the router
  * Locale - language setting
{{cucm-mva7.png|}}

==== IOS MVA VoiceXML ====
  * Configure MVA VoiceXML application at Cisco IOS gateway
  * Configure MVA application
<code>
application
  service mva http://<cucm-pub>:8080/ccmivr/pages/IVRMainpage.vxml
</code>

  * Incoming POTS dial peer to match the MVA media resource setting on CUCM
<code>
dial-peer voice 29991 pots
  service mva
  incoming called-number 2999
  direct-inward-dial
</code>

  * Outgoing voip dial peer to the MVA VXML number on CUCM
  * Must include DTMF relay
  * Must disable VAD
<code>
dial-peer voice 29992 voip
  destination-pattern 2999
  session target ipv4:<cucm-pub>
  dtmf-relay h245 alphanumeric
  codec g711ulaw
  no vad
</code>

  * (Optional) Translation pattern to strip the full E.164 number to the short MVA directory number
<code>
voice translation-rule 1
  rule 1 /.*5552\(...$\)/ /2\1/
!
voice translation-profile pstn-in
  translate called 1
!
voice-port 0/0/0:23
  translation-profile incoming pstn-in
</code>

  * PSTN dial peer for incoming and outgoing PSTN call
<code>
dial-peer voice 1 pots
  destination-pattern 9T
  incoming called-number 2...
  direct-inward-dial
  port 0/0/0:23
!
dial-peer voice 2 voip
  destination-pattern 2...
  session target ipv4:<cucm-pub>
  incoming called-number 9T
  codec g711ulaw
</code>