The D/42-NE2TM PCI, is a half-size voice processing board that interfaces directly to two-wire digital telephone ports on NEC's ElectraTM Professional II key terminal systems (KTS), and NEAX® 2400 ICS and 2000 IVS PBX series. It emulates four DTERM® Series III electronic telephones. The D/42-NE2 PCI can answer incoming calls, record and playback voice files, detect and generate tones, and signals. Patented call progress analysis algorithms and frequency analysis enable the D/42-NE2 PCI to make outbound calls, detect when calls are answered, and distinguish between different network signals.
When used with NEC PBX and KTS switches, the D/42-NE2 PCI provides a flexible platform for developing integrated call processing applications. Dialogic developers can integrate current applications on the D/42-NE2 PCI with minimal software modifications and create more efficient applications through the use of the Unified API.
With the correct switch software load, application programs using the D/42-NE2 PCI can access called/calling number ID for calls transferred within the switch, access trunk identification for calls originating outside the switch, and control message waiting indicators. The D/42-NE2 PCI also provides positive disconnect supervision (ElectraTM Professional II only) to immediately detect when a caller has hung up.
3.7.1. Features3.7.2. Functional DescriptionThe D/42-NE2 PCI board connects to four two-wire digital telephone ports of an NEC Electra Professional II key terminal system (KTS), and NEAX 2400 ICS and NEAX 2000 IVS PBX series switches.
Each line on the D/42-NE2 PCI board receives PCM (pulse code modulated) digital voice and control data from the NEC port. This digital voice is compressed by a DSP using an ADPCM (adaptive differential pulse code modulation) algorithm and sent to the host PC to be stored.
Control data from the NEC switch passes through the digital duplexer on the D/42-NE2 PCI to a command processor where it is converted from its native format to D/41D format. The resulting serial bit stream is then converted into a parallel bit stream that is sent via the local bus to the on-board control processor which either acts on the information or passes the event to the application.
Figure 5. D/42-NE2 PCI Functional Block Diagram
Incoming data for each channel is divided into separate voice and control data signaling parts. The voice portion contains the digitized voice data, while the control data signaling portion contains the telephone and special feature signaling information for every channel. The digitized voice data is compressed by the DSP and sent to the PC for storage. When sending stored voice data to the PBX, the digital voice data is sent from the PC to the DSP where it is uncompressed. It is then sent to the KSU via the digital duplexer.
In addition to having all the standard features of a Dialogic D/41D board, the D/42-NE2 board can access enhanced PBX features such as:
The D/42-NE2 PCI has an on-board microprocessor and a high speed Digital Signal Processor (DSP) to provide voice and call processing. SpringWareTM voice processing firmware is downloaded from the host computer to RAM and DSP memory when the D/42-NE2 PCI board is started. SpringWare offers several features including PerfectPitchTM Speed Control, PerfectLevelTM Volume Control, Global Tone DetectionTM, and Positive Voice DetectionTM. Global Tone Detection allows applications to detect special intercept tones, fax tones, modem tones, non-standard PBX tones, or user-defined tones, such as tones in international networks.
Other DSP-based SpringWare features include variable voice sampling rates of 24 and 32 Kb/s ADPCM, and 48 and 64 Kb/s Mu-law PCM. An application may dynamically switch between sampling rates and coding methods to meet specific requirements for voice quality and data storage. Enhanced algorithms provide reliable DTMF detection, DTMF cut-through, and talk off/play off suppression.
3.7.3. ConfigurationsThe D/42-NE2 PCI board can be connected to the NEC Electra Professional II key terminal systems (KTS), the NEAX 2400 ICS, and the NEAX 2000 IVS PBX series systems (check specific models and software releases for compatibility) to build sophisticated, computer telephony systems. The D/42-NE2 PCI board installs in IBM® PC XT®/AT® (PCI bus) and compatible computers (80286TM, 80386TM, 80486TM or PentiumTM-based PC platforms). The D/42-NE2 PCI board occupies a single expansion slot and up to 16 boards can be configured in a system with each board sharing the same interrupt level. The maximum number of lines that can be supported is dependent on the application, the amount of disk I/O required, and the host computer's CPU.
The D/42-NE2 PCI board shares a common hardware and firmware architecture with other Dialogic products for maximum flexibility and scalability. Features can be added or systems can grow while protecting investment in hardware and application code. With only minimum modifications, applications can be easily ported to lower or higher line-density platforms.
3.7.4. Software SupportFor information on other operating system support, contact your Dialogic Sales Engineer. The development package includes all required libraries, drivers and headers for simplified and seamless PBX integration. Diagnostics and demo programs provide additional tools and examples that allow developers to create complex multichannel voice applications.
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