John Alexander is a director of CallManager software development at Cisco Systems, Inc. He has more than 35 years of experience in software development, including more than 25 years of management experience. His experience is primarily in the field of voice communications, including call processing, voice messaging, call center, and switching systems. John was a member of the team that developed and implemented the CallManager software from its early stages.

Chris Pearce is a Cisco distinguished engineer in the CallManager software development group at Cisco Systems, Inc. He has 14 years of experience in telecommunications. His primary areas of expertise include call routing, call control, and telephone features. Chris was a member of the team that developed and implemented the CallManager software from its early stages, and he was and continues to be directly involved in developing the system architecture and design.

Anne Smith is a technical writer in the CallManager support group at Cisco Systems. She has 12 years of documentation experience and was a member of the team that developed the CallManager documentation from its early stages. She currently writes engineering and customer-seen documents for CallManager, IP Phones, and other Cisco IP Communications products. She holds a B.A. in language and literature and is a coauthor of Cisco CallManager Best Practices (ISBN: 1-58705-139-7), Troubleshooting Cisco IP Telephony (ISBN: 1-58705-075-7), and Developing Cisco IP Phone Services (ISBN: 1-58705-060-9).

Delon Whetten is a senior manager of the core call processing team in the CallManager software development group at Cisco Systems, Inc. He has more than 28 years of software development experience. His experience centers on communication systems and includes the design and development of message switching, voice messaging, video teleconferencing, and VoIP call processing systems. Delon was a member of the team that developed and implemented the CallManager software from its early stages, and he was directly involved in developing the system architecture and design.