Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Office Controller was a networking concept of the early to mid-1980s. The concept was used by PABX manufacturers as the basis of families of products in which the PBX would supply data connectivity and applications along with its traditional voice services. The Office Controller would be a central switch which would link users to applications and provide necessary services such as security. There was much discussion at that time of multimedia voice/data services but the conception of these services was very vague. There was no real understanding of the utility and therefore customer value of these services. As a result, Office Controller services were usually restricted to various forms of modem pooling.
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