Tài liệu Cisco.Unified.Communications.System.Administrator.UCSA.1.1.Student.Guide.Dec.2003 pptx

Cisco - Cisco Unified Communications System Administrator (UCSA) 1.1                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          