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8.1 Introduction

The CT Access Switching service: Provides a set of functions for controlling Multi-Vendor Integration Protocol (MVIP) switch blocks on MVIP and H.100 compliant switching devices. The switch block is used in the Switching service functions to make or break connections, send patterns, sample data, query, reset, configure, and run diagnostics on different parts of the MVIP switching device. Is based on the MVIP-95 device driver standard. It may be used to access MVIP-95 and MVIP-90 device drivers.
An MVIP system permits a variety of telephony devices on boards from different vendors to be connected to each other. Switching is the process of changing those connections, both during and between phone calls.
The Switching service provides functions to: Open and close switching devices Make connections and access inputs and outputs Configure the clocks Obtain and configure stream speed information Get configuration information about streams, timeslots, boards, and drivers Access the underlying MVIP device driver Perform miscellaneous switching functions
All functions in the Switching service are synchronous.

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