====== Presence ======

===== General =====
  * Presence Group do not apply to presence-enabled speed dials i.e. BLF
  * Watcher subscribes to status information of the presence entity
{{cucm-pres1.png|}}

  * Watcher can show the status of a presence entity using:
    * Presence enabled speed dials (BLF)
    * Presence enabled lists (call and directory lists)
  * Only the Type B phone will show colour speed dial button for presence status
    * Red - off-hook
    * Green - on-hook
{{cucm-pres2.png|}}

  * Three possible states
    * Entity is unregistered
    * Entity is registered - on-hook
    * Entity is registered - off-hook

===== Supported Phones =====
^  **IP Phones**  ^  **Presence Speed Dial**  ^  **Presence Directory List**  ^
|  794[125], 796[125],\\ 797[015]\\ SIP and SCCP  |  Yes  |  Yes  |
|  7914, 7940, 7960\\ SCCP  |  Yes  |  No  |
|  7914, 7940, 7960\\ SIP   |  No  |  No  |

===== Limit Visibility =====
  * We can limit visibility of presence information
  * Presence enabled speed dials
    * Can only be defined by Administrator
    * Subscribe CSS applied to watcher
    * We are reusing the partition for the line
    * Presence Group has no effect for BLF speed dial
  * Presence enabled call and directory lists
    * Subscribe CSS applied to watcher
    * We are reusing the partition for the line
    * Presence Group
  * If no partition is assigned to a line or route pattern, it is available to all watchers

==== Presence CSS ====
{{cucm-pres8.png|}}

==== Presence Group ====
  * Watchers and presence entities are put into presence group
  * Subscriptions are permitted within presence groups
  * Subscriptions can be allowed or denied between groups 
    * Permission can be configured independently for each direction
  * IP Phones have separate presence groups
    * Line presence group (presence entity)
      * Like partition applied to line, restrict who can subscribe to the presence status of this line
      * The presence group assign at the watcher device level must be allowed to subscribe to presence group assigned on the line to monitor its presence status
    * Phone presence group (watcher)
      * Like CSS, dictate which lines the device can subscribe to
  * SIP trunks have only one presence group
    * As you cannot assign presence group to a route pattern
    * used for both watcher and presence entity 
    * For SIP trunk to Presence server
      * Best to leave it in its own presence group e.g. Standard Presence Group and allow subscription to/from all other group
  * End user can be assigned a presence group
    * Used when they are login using extension mobility
    * And when they are associated with a device
{{cucm-pres9.png|}}

==== Presence Server ====
  * If CUPC is configured for a particular line, the presence subscription to that line will be determined solely by the presence group assigned to the SIP trunk to the presence server.
  * E.g. If line 5002 with CUPs enabled belongs to HQ group and the Presence SIP trunk belongs to Standard Presence group
    * For another group e.g. BR1 to see the presence status of line 5002, it must be allowed to subscribe to the standard presence group
    * It is not necessary to be subscribed to the HQ presence group. In fact it will not work if BR1 is subscribed to only the HQ group
  * I think by having CUPS and CUPC configured, the control of the presence subscription is passed to the presence server and taken off the device.

==== Examples ====
  * Both Presence Group and CSS can be combined.
  * Useful in larger deployment
  * Example
    * No subscriptions are allowed across department
    * Within a department, managers can only be watched by their assistants
  * Solution
    * Use one presence group per department
    * Deny inter-presence group subscriptions
    * Include manager partition only in the subscribe CSS of their assistant

===== Configuration Speed Dial =====

==== Phone Button Templates ====
  * Under **Device > Device Settings > Phone Button Template**
  * Add BLF Speed Dial
{{cucm-pres3.png|}}

==== Add to Phones ====
  * Under **Device > Phone**
  * Assign Phone Button Template
{{cucm-pres4.png|}}

==== Configure BLF Speed Dial ====
  * Under **Device > Phone**
  * Add number to watch
{{cucm-pres5.png|}}

===== Configuration Call List =====

==== Enterprise Parameter ====
  * To enable presence enabled call list (call and directory list)
  * Under **System > Enterprise Parameters**
  * BLF for Call List = Enabled (default is disabled)
{{cucm-pres6.png|}}

===== Configuration SIP Trunk =====
  * To enable presence on SIP trunk e.g. to a presence server

==== Security Profile ====
  * Under **System > Security Profile > SIP Trunk Security Profile**
  * Accept Presence subscription
  * Allow unsolicited notification
{{cucm-pres7.png|}}

===== Configuration Presence CSS =====

==== Partitions and CSS ====
  * Configure partition and CSS

==== Assign partition ====
  * Assign partition to lines and route patterns

==== Assign CSS ====
  * Assign subscribe CSS to phones and trunks
{{cucm-pres10.png|}}

===== Configuration Presence Group =====

==== Presence Group ====
  * Configure Presence Group
  * Setup permission between existing group or leave it to the default defined under service parameter
  * Presence Group Relationship
    * SUBSCRIBE TO relationship
    * Define what group this presence group can subscribe or not subscribe to
{{cucm-pres11.png|}}

==== Inter-Presence Policy ====
  * Under **System > Service Parameter (Cisco CallManager)**
  * Set the default inter-presence group policy
  * Default is disallow
{{cucm-pres12.png|}}

==== Assign Presence Group ====
  * Assign presence group to lines, phones and SIP trunks

**Assign to Phones/Lines**
  * Under **Device > Phone**
    * set the watcher group
    * Define who you can watch
  * Under **Call Routing > Directory Number**
    * set the presence entity group
    * Define who can watch you
{{cucm-pres13.png|}}

**Assign to SIP trunk**
  * Under **Device > Trunk**
  * The presence group configured on SIP trunk applies to both subscriptions being sent out and being received on the trunk
{{cucm-pres14.png|}}