订阅CSS和Presence

Cisco Unified Communications Manager (CUCM) 5.0引入了在线状态支持。存在类似于一些传统PBX系统中使用的忙站选择、忙灯现场功能。在CUCM中，使用SIP中继的不同供应商可以共享基于标准的状态信息。在运行Microsoft Office Communicator (MOC)客户机的环境中，与Microsoft OCS服务器共享状态信息是非常常见的。这个博客将提供一个存在的概述，并描述订阅调用搜索空间(CSS)配置元素的功能。CUCM 5.0及以后版本支持话机按键模板配置中的快速拨号BLF(忙灯域)。快速拨号BLF与传统快速拨号一样，但也提供状态(可用性)信息。如果快速拨号指向的目标电话号码是另一个思科IP电话，则与快速拨号相关的按钮的LED将变为亮红色。红色的LED是一个指示灯，表示目的地是off - hook和不可用的时间。思科IP电话LCD上的图标也会改变，以表示挂机、摘机或不可用状态。 Cisco Type A phones (7940,7960,7910,7912,7905) do not have LED indicators. Presence information can also be enabled in call history lists (missed, received, placed calls) and the corporate directory. Presence information can be shared with other CUCM clusters and third parties through SIP trunks only (H.225 and nont-GK controlled ICT trunks do not support this functionality). All phones are in the same presence group by default and all phones have unrestricted presence viewing capabilities. A phone with a speed dial BLF is known as a watcher in SIP standards language, while the destination DN that’s being watched is known as the presence entity. Managers and executives may not be very happy that the interns can monitor their phone use status. Presence groups and Subscribe CSS represent two techniques for limiting presence viewing. Presence groups should be deployed to restrict presence capabilities before using the subscribe CSS element. An organization may decide to use three different presence groups: Management, Sales, and Staff. Each member of the same presence group can be watched by any other member of the presence group by default. Members of different presence groups cannot watch each other by default, but inter-presence group policies can be configured. The following inter-presence group configurations may be configured: •Management can watch sales and/or staff •Sales can watch staff, but can NOT watch management •Staff can watch other members of staff, but NO other presence group members Although similar presence viewing limitations could be configured with subscribe CSS, the subscribe CSS can be used to further limit who can watch who within the same presence group. There may be a situation where one manager #1 is watching manager #2 and manager #2 does not want manager #1 to have this visibility. A Subscribe CSS can be applied to manager #1’s phone that does not include the partition of the directory number of manager #2. If manager #1 and manager #2 are in the same management partition, additional partitions may need to be configured and the existing dial plan CSS may need to be modified. I will personally try to avoid subscribe CSS at all costs. I would rather create a new, unique presence group for people who do not want to be watched. Unfortunately, they would be able to watch each other, but hopefully that issue would not arise. Links http://unifiedcommunicationsblog.globalknowledge.com/