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Glossary
An operating mode of certain DM3 kernel or host library function calls. Asynchronous mode is a non-blocking mode that is typically used when a function involves operation on a remote processor (e.g., a host library function that initiates a kernel operation on a DM3 platform's Control Processor) or when data movement via the MMA and global memory is required. In asynchronous mode a value signifying "pending" status is immediately returned to the calling function, and the actual completion or failure of the operation is reported to the caller via a DM3 result message.
A circuit used on Dialogic boards to convert analog voice data to digital and digital voice data to analog audio.
Adding computer intelligence to the making, receiving, and managing of telephone calls.
A processor that is present on the motherboard of every DM3 platform for the management of the SCbus/CT bus, for host communication configuration, and to implement some of the features of DM3 Resources. All current DM3 platforms use an Intel i960 as the Control Processor.
Firmware that is present on each processor on a DM3 platform to support configuration management, host communication, inter processor communication and control, and SCSA firmware services among others. There may be more than one version of the DM3 kernel firmware depending on the type of processor (e.g. CP vs. DSP or RISC signal processor) and the intended application of each processor.
A loadable block of executable firmware for a particular processor on a DM3 platform. A DM3 Resource may be packaged as one or more DM3 load modules.
A way of signaling consisting of a push-button or touch-tone dial that sends out a sound consisting of two discrete tones that are picked up and interpreted by telephone switches (either PBXs or central offices).
called by a G3FE. It initiates IFT service for the calling G3FE and connects to a Receiving Gateway.
The 2.048 Mbps digital carrier system common in Europe.
An ASCII file that lists any non-default parameter settings that are necessary to configure a DM3 hardware/firmware product for a particular feature set. The downloader utility reads this file, and for each parameter listed generates and sends the DM3 message necessary to set that parameter value.
A set of SCbus/CT bus timeslots which are grouped together for synchronization purposes. The period of a frame is fixed (at 125 µsec) so that the number of time slots per frame depends on the SCbus/CT bus data rate. In the context of DSP programming (e.g. DM3 component development), the period defined by the sample rate of the signal data.
Group 3 Fax Equipment. A traditional fax machine with analog PSTN interface.
An H.323 entity on the Internet that provides address translation and control access to the network for H.323 Terminals and Gateways. The Gatekeeper may also provide other services to the H.323 terminals and Gateways, such as bandwidth management and locating Gateways.
An H.323 Gateway (GW) is an endpoint on the Internet which provides for real-time, two-way communications between H.323 Terminals on the Network and other ITU Terminals on a wide area network, or to IP Telephony clients.
A set of International Telecommunication Union (ITU) standards that define a framework for the transmission of real-time voice communications through Internet protocol (IP)-based packet-switched networks. The H.323 standards define a gateway and a gatekeeper for customers who need their existing IP networks to support voice communications.
Internet Aware Fax. The combination of a G3FE and a T.38 gateway.
International Telecommunications Union (ITU)
An organization established by the United Nations to set telecommunications standards, allocate frequencies to various uses, and hold trade shows every four years.
An inter-network of networks interconnected by bridges or routers. LANs described in H.323 may be considered part of such inter-networks.
The network layer protocol of the transmission control protocol/Internet protocol (TCP/IP) suite. Defined in STD 5, Request for Comments (RFC) 791. It is a connectionless, best-effort packet switching protocol.
Internet Service Provider (ISP)
A vendor who provides direct access to the Internet.
The transmission of voice over an Internet Protocol (IP) network. Also called Voice over IP (VoIP), IP telephony enables users to make telephone calls over the Internet, intranets, or private Local Area Networks (LANs) and Wide Area Networks (WANs) that use the Transmission Control Protocol/Internet Protocol (TCP/IP).
See International Telecommunications Union.
The deviation of a transmission signal in time or phase. It can introduce errors and loss of synchronization in high-speed synchronous communications.
Adapter card inserted into computer that contains necessary software and electronics to enable station to communicate over network.
A type of datum that is passed to or from a component via a DM3 message. Parameters generally have two elements, a type and a specific value. Parameters passed to a component affects the operational characteristics of the component, and parameters passed from a component can be used to report the operating state of the component. As an example, the standard Player component accepts a parameter called ParmDuration, which specifies the length of the file that is being played back, and can report its current state (e.g. playing, paused, etc.) via a parameter called ParmState.
An ASCII text file that contains product or platform configuration description information that is used by the DM3 downloader utility program. Each of these files identifies the hardware configuration and firmware modules that make up a specific hardware/firmware product. Each type of DM3-based product used in a system requires a product-specific PCD file.
see Public Switched Telephone Network
Public Switched Telephone Network
The telecommunications network commonly accessed by standard telephones, key systems, Private Branch Exchange (PBX) trunks and data equipment.
accepts a connection from an Emitting Gateway. It calls a G3FE and provides IFT service to the called G3FE.
A transport connection used for reliable transmission of an information stream from its source to one or more destinations.
Transmission of messages from a sender to a receiver using connection-mode data transmission. The transmission service guarantees sequenced, error-free, flow-controlled transmission of messages to the receiver for the duration of the transport connection.
The standard bus for communication within a SCSA node. The architecture of SCbus includes a 16-wire TDM data bus that operates at 2, 4 or 8 Mbps and a serial message bus for control and signaling. DM3 platforms provide an SCbus interface for interconnection of multiple DM3 platforms, or connection to other SCSA-compatible hardware. The DM3 platform supports timeslot bundling for high bandwidth, and can access up to 256 of the 2048 SCbus timeslots via two SC4000 ASICs.
An embedded processor on a DM3 platform that is used to execute signal processing algorithms. The DM3 architecture supports multiple types of SPs, including RISC processors as well as general purpose DSPs, and platforms may be configured with a mixed complement of SP types.
Session Initiation Protocol: an Internet standard specified by the Internet Engineering Task Force (IETF) in RFC 2543. SIP is used to initiate, manage, and terminate interactive sessions between one or more users on the Internet.
An operating mode of certain DM3 kernel or host library function calls. Synchronous mode is a blocking mode that is typically used only when a function executes on the local processor using data that is also local to the processor (i.e. that does not require any data movement via the MMA).
A digital transmission link with a capacity of 1.544 Mbps used in North America. Typically channeled into 24 digital subscriber level zeros (DS0s), each capable of carrying a single voice conversation or data stream. T1 uses two pairs of twisted pair wires.
see Transmission Control Protocol
An H.323 Terminal is an endpoint on the local area network which provides for real-time, two-way communications with another H.323 terminal, Gateway, or Multipoint Control Unit. This communication consists of control, indications, audio, moving color video pictures, and/or data between the two terminals. A terminal may provide speech only, speech and data, speech and video, or speech, data, and video.
The TCP/IP standard transport level protocol that provides the reliable, full duplex, stream service on which many application protocols depend. TCP allows a process on one machine to send a stream of data to a process on another. It is connection-oriented in the sense that before transmitting data, participants must establish a connection.
Facsimile UDP Transport Layer protocol
The TCP/IP standard protocol that allows an application program on one machine to send a datagram to an application program on another machine. Conceptually, the important difference between UDP datagrams and IP datagrams is that UDP includes a protocol port number, allowing the sender to distinguish among multiple destinations on the remote machine.
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