Cisco Systems OL-10663-02 Restrictions for Presence Service, Information About Presence Service

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Configuring Presence Service

Restrictions for Presence Service

Restrictions for Presence Service

•Presence features such as Busy Lamp Field (BLF) notification are supported for SIP trunks only; these features are not supported on H.323 trunks.

•Presence requires that SIP phones are configured with a directory number (using dn keyword in number command); direct line numbers are not supported.

Information About Presence Service

To configure presence service in a Cisco Unified CME system, you should understand the following concept:

•Presence Service, page 886

Presence Service

A presence service, as defined in RFC 2778 and RFC 2779, 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. When you configure presence in a Cisco Unified CME system with a SIP WAN connection, a phone user, or watcher, can monitor the real-time status of another user at a directory number, the presentity. Presence enables the calling party to know before dialing whether the called party is available. For example, a directory application may show that a user is busy, saving the caller the time and inconvenience of not being able to reach someone.

Presence 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 system. Phones act as watchers and a presentity is identified by a directory number on a phone. Watchers initiate presence requests (SUBSCRIBE messages) to obtain the line status of a presentity. Cisco Unified CME responds with the presentity’s status. Each time a status changes for a presentity, all watchers of this presentity are sent a notification message. SIP phones and trunks use SIP messages; SCCP phones use presence primitives in SCCP messages.

Presence supports Busy Lamp Field (BLF) notification features for speed-dial buttons and directory call lists for missed calls, placed calls, and received calls. SIP and SCCP phones that support the BLF speed-dial and BLF call-list features can subscribe to status change notification for internal and external directory numbers.

Figure 53 shows a Cisco Unified CME system supporting BLF notification for internal and external directory numbers. If the watcher and the presentity are not both internal to the Cisco Unified CME router, the subscribe message is handled by a presence proxy server.

Cisco Unified Communications Manager Express System Administrator Guide

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OL-10663-02

 

 

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Contents Contents Prerequisites for Presence ServicePresence Service Restrictions for Presence ServiceInformation About Presence Service 886887 How to Configure Presence ServiceThis section contains the following tasks Example Command or Action PurposeEnabling Presence for Internal Lines 888Enabling a Directory Number to be Watched 889890 BLF Speed-Dial Enable Configure terminalBLF Call-List Cisco Unified IP PhoneMax-ephones command 892893 894 Max-pool commandVoice register dn command 895 Configuring Presence to Watch External LinesEnable Configure terminal Presence Authenticate credential tag location End 896897 Verifying Presence ConfigurationShow running-config Debug presence all asnl errors event info timer trace xml Troubleshooting PresenceUse this command to display presence configuration settings Show presence globalDebug ephone blf mac-address mac-address 899This section contains the following example Configuration Examples for PresencePresence in Cisco Unified CME Example 900901 902 Control-planeRelated Topic Document Title Additional ReferencesRelated Documents 903904 Technical AssistanceDescription Link Presence Service Presence with BLF was introduced Feature Information for Presence ServiceCisco Unified CME Feature Name Version Modification 905906

OL-10663-02 specifications

Cisco Systems OL-10663-02 refers to a specific educational course or training program offered by Cisco. This program is part of Cisco's extensive range of certifications and training solutions that aim to equip IT professionals with the necessary skills to manage and optimize networks using Cisco technologies.

One of the main features of OL-10663-02 is its focus on the fundamentals of network design and implementation. Participants learn about essential networking concepts, including IP addressing, subnetting, routing protocols, and network security. The course is designed to provide a solid grounding in these topics, making it suitable for both aspiring network engineers and seasoned professionals looking to refresh their knowledge.

Another significant aspect of OL-10663-02 is its integration with real-world scenarios. The course effectively combines theoretical knowledge with practical applications, enabling learners to understand how to apply what they've learned in actual network environments. Additionally, the program often includes hands-on labs and simulations, allowing participants to gain valuable experience in configuring and troubleshooting Cisco devices.

Cisco's commitment to using the latest technologies is also evident in OL-10663-02. The course incorporates advanced networking paradigms such as Software-Defined Networking (SDN) and network automation. These technologies are crucial in today's fast-evolving IT landscape, where businesses are increasingly looking to streamline their network operations and improve efficiency.

Moreover, OL-10663-02 emphasizes the importance of security in networking. Participants are educated on best practices for implementing robust security measures, understanding threats, and responding to security incidents effectively. This aspect of the course is critical, given the rising concerns regarding cybersecurity in the modern world.

Overall, Cisco Systems OL-10663-02 is an essential training program that combines theoretical knowledge, hands-on practice, and an emphasis on current technologies and security. As organizations continue to rely on complex networks, courses like OL-10663-02 play a vital role in preparing IT professionals to meet the challenges of modern network management and optimization effectively. By completing this course, participants can enhance their skill set and increase their marketability in a competitive job landscape.
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