analog: In this guide, analog refers to agent communications between a headset or a telephone and the MSI/SC or to the loop-start type of network interface.
asynchronous function: Allows program execution to continue without waiting for a task to complete. See synchronous function.
baseboard: A term used in voice processing to mean a printed circuit board without any daughterboards attached.
channel: 1. When used in reference to a Dialogic digital expansion board, a data path, or the activity happening on that data path. 2. When used in reference to the CEPT telephony standard, one of 32 digital data streams (30 voice, 1 framing, 1 signaling) carried on the 2.048 MHz/sec E-1 frame. (See time slot.) 3. When used in reference to a bus, an electrical circuit carrying control information and data.
data structure: C programming term for a data element consisting of fields, where each field may have a different type definition and length. The elements of a data structure usually share a common purpose or functionality, rather than being similar in size, type, etc.
daughterboard: In the context of this guide, the DCB/SC daughterboard assembly. The daughterboard enables the DCB/SC hardware to interface to analog station devices.
DCB/SC: The Dialogic single slot, DSP-based conferencing solution. Each product in the DCB/SC series contains one, two, or three DSP(s). Each Digital Signal Processor (DSP) supports up to 32 conferees, for a maximum of 96 (3 sets of 32) conferencing resources.
device: Any computer peripheral or component that is controlled through a software device driver.
digital: Information represented as binary code.
DIP switch: A switch usually attached to a printed circuit board with two settings- on or off. DIP switches are used to configure the board in a semipermanent way.
driver: A software module that provides a defined interface between a program and the hardware.
DTMF: Dual Tone Multi-Frequency. DTMF refers to the combination of two tones which represents a number on a telephone key pad. Each push-button has its own unique combination of tones.
E-1: Another name given to the CEPT digital telephony format devised by the CCITT that carries data at the rate of 2.048 Mbps (DS-1level). This service is available in Europe and some parts of Asia.
event: An unsolicited communication from a hardware device to an operating system, application, or driver. Events are generally attention-getting messages, allowing a process to know when a task is complete or when an external event occurs.
Extended Attribute functions: Class of functions that take one input parameter (a valid Dialogic device handle) and return device-specific information.
host PC: The system PC in which Dialogic hardware and software are installed and applications are run and/or developed.
loop start interfaces: Devices, such as an analog telephones, that receive an analog electric current. For example, taking the receiver off hook closes the current loop and initiates the calling process.
MSI: Modular Station Interface. A PEB-based Dialogic expansion board that interfaces PEB time slots to analog station devices by way of modular daughterboards.
MSI/SC: Modular Station Interface. An SCbus-based Dialogic expansion board that interfaces SCbus time slots to analog station devices.
PC: Personal computer. In this guide, the term refers to an IBM Personal Computer or compatible machine.
rfu: Reserved for future use.
SCbus: Signal Computing bus. A hardwired connection between Switch Handlers (SC2000 chips) on SCbus-based products for transmitting information over 1024 time slots to all devices connected to the SCbus.
SCSA: Signal Computing System Architecture. A generalized open-standard architecture describing the components and specifying the interfaces for a signal processing system for the PC-based voice processing, call processing and telecom switching industry.
Signal Computing System Architecture: See SCSA.
Standard Attribute functions: Class of functions that take one input parameter (a valid Dialogic device handle) and return generic information about the device. The Dialogic SRL contains Standard Attribute functions for all Dialogic devices. Standard Attribute function names are case-sensitive and must be in capital letters. See Extended Attribute functions.
synchronous function: Blocks program execution until a value is returned by the device. Also called a blocking function. See asynchronous function.
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