ages; mobil- ity features; and extensible SIP support. The most notable trends include the fact that video is coming to the desktop. Point-to-point or multiparty video is being offered by the majority of leading IP PBX vendors, and the cost per desktop is now generally under US$200. Document collaboration now allows document sharing to be more than a one-way display of PowerPoint slides. Impressive new capabilities from leading vendors include real- time coediting and collaborative working on the same document. In addition, exciting new mobility capabilities are being developed, ranging from a simple SMS gateway that lets local IM users send short messages directly to coworkers' mobile phones and pagers to sophisticated call control features with which remote and traveling workers can easily place calls and set up complex conferences. Not every product will contain each and every one of the key collaboration and conferencing features, but the following is a comprehensive list of the types of fea- tures that are available: soft phone support; the use of presence, be it dynamic or static; mobility features; conferencing, either scheduled or ad hoc; search capabili- ties; contacts and database access and integration; video (either point-to-point or multipoint); call control of external devices as well as call control filters that allow you to find me and follow me; recent call history; the ability to sort or quick-dial; IM, with chat or multiparty IM; document viewing and presentation; document collaboration and coediting; and whiteboarding and Web cobrowsing. As this list shows, a significant number of productivity-enhancing features are becoming available and adding a new dimension of value to IP PBX functionality. The key unified messaging features include redundant voicemail servers; text- to-speech readout of e-mail (in multiple languages); automatic speech recognition; an inbox that shows the caller by automatic number identification and/or name; voicemail and e-mail that indicate the message duration; the abi