Understanding & Configuring Presence Service in Cisco Unified CME

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A presence service is a system for finding,retrieving, and distributing presence information from a source, called a presence entity (presentity), to an interested party called a watcher.Presence Service enables the calling party to know before dialing whether the called party is available.Presence features uses SIP SUBSCRIBE and NOTIFY methods to allow users and applications to subscribe to changes in the line status of phones in a Cisco Unified CME .Phones act as watchers and a presentity is identified by a directory number on a phone.

SIP phones and trunks use SIP messages for presence information; SCCP phones use presence primitives in SCCP messages.SIP/SCCP phones can subscribe to Busy Lamp Field (BLF) speed-dial notification as well as BLF for directory call lists for missed calls, placed calls, and received calls.

Here are the steps you need to setup BASIC presence feature in CUCME:

  • Enabling Presence for Internal Lines:

cucme(config)#sip-ua
cucme(config-sip-ua)#presence enable
cucme(config)#presence
cucme(config-presence)#max-subscription 100
cucme(config-presence)#presence call-list

  • SCCP : Enabling a Directory Number to be Watched :

cucme(config)#ephone-dn 2
cucme(config-ephone-dn)#allow watch

  • SIP : Enabling a Directory Number to be Watched :

cucme(config)#voice register dn 2
cucme(config-ephone-dn)#allow watch

  • SCCP : Enabling BLF Monitoring for Speed-Dials and Call Lists :

cucme(config)#ephone 2
cucme(config-ephone)#blf-speed-dial 1 3001 label “Receptionist”

Enable “Phone Based Monitoring” using following syntax:

cucme(config)#ephone 2
cucme(config-ephone)#blf-speed-dial 1  3001 label “Receptionist” device

  • SIP: Enabling BLF Monitoring for Speed-Dials and Call Lists:

cucme(config)#voice register pool 2
cucme(config-ephone)#blf-speed-dial 1 3001 label “Receptionist”

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