Four-Port Voice Processing Board
HALF SIZE, ISA INTERFACE
The DIALOG/4 board, with its half-size is an ideal solution for computer telephony installations that cannot take full-size voice boards. It provides four telephone line interface circuits that are approved for direct connection to analog loop start lines. A dual-processor architecture, consisting of a DSP (Digital Signal Processor) and a general-purpose microprocessor, handles all telephony signaling and performs DTMF (touch tone) and audio/voice signal processing tasks. Multiple DIALOG/4 boards can be installed in a single PC chassis enabling system expansion up to 64 ports.
Features and Benefits
* Four independent voice processing ports in a single, half-size PC ISA slot supporting low- to medium-density voice systems
* Download signal and call processing firmware facilitates feature enhancement and provides field-proven performance based on over 3 million installed ports
* C language application program interfaces (APIs) for MS-DOS*, Windows 95*, Windows NT*, OS/2(r), and UNIX(r) shorten your development cycle so you can get your applications to market faster
* Application generators available from third-party providers
* Configure multiple DIALOG/4 boards in a single PC for easy and cost effective system expansion, and to build scalable systems from 4 to 64 ports
* Voice coding at dynamically selectable data rates, 24 Kb/s to 64 Kb/s, selectable on a channel-by-channel basis for optimal tradeoff in disk storage and voice quality
* Enhanced telephone circuitry and automatic gain control maintains recording quality over a wide dynamic range
* Perfect Digit DTMF (touchtone) provides reliable detection during voice playback - allows callers to "type-ahead" through menus
* Patented outbound call progress analyzes outgoing call status quickly and accurately
* Supports PBX Expert and PBX Expert/32, utilities that simplify switch integration
The DIALOG/4 board uses a dual-processor architecture that combines the signal processing capabilities of a DSP with the decision-making and data movement functionality of a general-purpose 80C188 control microprocessor. This dual processor approach offloads many low-level decision-making tasks from the host computer enabling development of more powerful applications. This architecture handles real-time events, manages data flow to the host PC for faster system response time, reduces host PC processing demands, processes DTMF and telephony signaling, and frees the DSP to perform signal processing on the incoming call.
Each of four loop start telephone line interfaces on the DIALOG/4 board receives analog voice and telephony signaling information from the telephone network (see block diagram). Each line interface uses reliable, solid-state hook switches (no mechanical contacts) and FCC part 68 class B ring detection circuitry. This FCC-approved ring detector is less susceptible to spurious rings created by random voltage fluctuations on the network. Each interface incorporates circuitry that protects against high-voltage spikes and adverse network conditions allowing applications to go off-hook any time during ring cadence without damaging the board.
* Voice mail/voice messaging
* Interactive voice response
* Inbound and outbound telemarketing
* Operator services
* Auto dialers
* Telecomputing servers
* Notification systems
* On-line data entry/query
Voice products offer a rich set of advanced features, including state-of-the-art DSP technology and signal processing algorithms, for building the core of any computer telephony system. Downloaded firmware algorithms executed by the on-board DSP provide voice coding at 24 and 32 Kb/s ADPCM, and 48 and 64 Kb/s PCM. Sampling rates and coding methods are selectable on a channel-by-channel basis. Applications may dynamically switch sampling rate and coding method to optimize data storage or voice quality as the need arises. Downloaded firmware algorithms also provide reliable DTMF detection, DTMF cut-through, and talk off/play off suppression over a wide variety of telephone line conditions. Enhanced telephone circuit design and automatic gain control maintains recorded voice quality even at extremely low signal levels.
The DIALOG/4 voice board:
* Connects directly to the telephone line
* Automatically answers calls
* Detects touch tones
* Plays voice messages to a caller
* Digitizes, compresses, & records voice signals
* Places outbound calls and automatically reports the results all in real time on four independent channels.
The DIALOG/4 board shares a common hardware and firmware architecture with other voice boards for maximum flexibility and scalability. You can easily add new features and/or expand the size of the system while protecting your original investment in hardware and application code. Applications can be ported to lower or higher line-density platforms with minimal modifications.
The DIALOG/4 board installs in IBM PC XT/AT* (ISA bus) and compatible computers (Intel386™, Intel486™, or Pentium® processor-based PC platforms). The DIALOG/4 board provides everything required for building integrated voice solutions scalable from four ports to 64 ports.
Software Support ( Not Included with board )
The DIALOG/4 is supported by System Software and SDK for MS-DOS*, Windows NT*, Windows 95*, OS/2*, and UNIX*. These packages contain a set of tools for developing complex multichannel applications.
30 Day Guarantee against defect.
This board is in perfect working order
and has been secured in antistatic and boxed.
Fast Priority insured shipping.
- Brand: Dialogic
- Mfg Part #: 85-0163-006
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