Dialogic Dual Span Series

Voice Processing and E-1/T-1 ISDN PRI Boards

Features and Benefits

• High channel-per-slot density: two E-1/T-1 ISDN PRI lines plus 30 or 60 channels (E-1) 24 or 48 channels (T-1) of voice processing in a single ISA slot. System integrators and developers can lower costs by incorporating more ports per chassis, by using machines with fewer slots, and by easing configuration/installation.
• Create more cost-effective switching solutions via access to the SCbus with its 2,048 time slot capability; build higher density systems and large, multinode systems through SCxbus interbox communications. The SCbus also provides access to a wide variety of technologies such as fax, text-to- speech, and automatic speech recognition.
• Downloadable signal and call processing firmware, Spring Ware, provides easy feature enhancement and field-proven performance based on over 4 million installed ports
• Perfect Digit DTMF (touch tone) provides reliable detection during voice playback - lets callers "type-ahead" through menus
• Independent Motorola* DSP56002 digital signal processors, clocked at 66 MHz, each with private, high- speed SRAM, permit execution of Spring Ware signal processing algorithms
• Intel486GX™ microprocessors offload call processing tasks from host PC, giving more power to the application
• Board Locator Technology eliminates confusing dip switch or jumper settings and simplifies installation
• Configure multiple boards in a single PC (ISA bus) for easy and cost-effective system expansion on the best computing platform for your needs
• Support for worldwide ISDN Primary Rate protocols
• Supported in CT Media™ telephony server software, a standards-based application development software platform and run-time environment for building scalable applications that can run with other vendor's products on converged communication servers
• Supports Board Watch, the SNMP-compatible software for remote CT board management

Applications

• Voice messaging
• Interactive voice response
• Debit card and international call back
• Audiotex
• Operator services
• Telemarketing/call center
• Dictation
• Auto dialers
• Notification systems
• On-line data entry/query

The Intel® Dialogic® Dual Span Series of digital voice and network interface boards provide two E-1 or T-1 ISDN Primary Rate Interface (PRI) lines of service termination and call processing for 30 or 60 voice channels (E-1 boards) or 24 or 48 channels (T-1 boards) in a single PC slot. Functionally, the Dual Span boards are equivalent to two single-span boards, such as the D/300SC-E1 or D/240SC-T1 boards, combined into one single-slot ISA board. A unique multiprocessor architecture comprising digital signal processors (DSPs) and general-purpose microprocessors handles all telephony signaling and performs all DTMF, MF, and audio/voice signal processing tasks. Downloaded firmware algorithms, Spring Ware, executed by the on-board DSPs, provide variable voice coding at 24 and 32 Kb/s adaptive differential pulse code modulation (ADPCM), and 48 and 64 Kb/s µ-law or A-law pulse code modulation (PCM).

Sampling rates and coding methods are selectable on a channel-by-channel basis. Applications can dynamically switch sampling rate and coding method to optimize data storage or voice quality as the need arises. Spring Ware firmware also provides reliable DTMF detection, DTMF cut-through, and talk-off/play-off suppression over a wide variety of telephone line conditions.

Intel voice products offer a rich set of advanced features, including DSP technology and signal processing algorithms, for building the core of any CT system. With ISA bus expansion boards and a variety of channel densities to choose from, you can integrate these voice products easily into exactly the type of system you require.

In real time on all channels, Dual Span voice boards:

• Connect to 30/60 E-1 or 24/48 T-1 telephone channels
• Detect touch tones
• Play voice messages to a caller
• Digitize, compress, and record voice signals
• Place outbound calls and automatically report the result

Configurations

Use Dual Span boards to develop sophisticated, multifunction CT systems incorporating capabilities such as voice processing, speech recognition, and text-to-speech (TTS). The Dual Span boards share a common hardware and firmware architecture with other SCbus boards for maximum flexibility and scalability. Add features or grow the system while protecting your investment in hardware and application code. Applications can be ported to lower or higher line-density platforms with only minimum modifications.

The Dual Span boards install in IBM PC AT* (ISA bus) and compatible computers (Intel386™, Intel486™, and Pentium® processor-based PC platforms). A Dual Span board occupies a single expansion slot. Up to 16 boards can be configured in a system with each board sharing the same interrupt level. The number of boards and channels supported depends on the operating system used. 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 CPU and power supply.

Dual Span boards can operate in either terminate or drop-and-insert configurations. In a terminate configuration, the Dual Span board handles the call processing of the digital audio and telephony signaling. If additional resources such as automatic speech recognition (ASR), facsimile, or TTS are required, the resources can be switched to the call via the SCbus. When a Dual Span board is installed as a terminating device, no external channel bank is required and the system operates as a standalone call-processing node.

In a drop-and-insert configuration, the two E-1 or T-1 interfaces on the Dual Span board are connected via the SCbus and continuously pass all network interface time slots through to each other. This configuration can join two separate network interface lines or it can be placed in-line, between an E-1 or T-1 line and a switch (a PBX, for example). Calls on individual E-1 or T-1 channels can either terminate at one of the call processing resources on board or "flow through" transparently from the "upstream" E-1/T-1 interface to the "downstream" interface. In this configuration, the 24 (T-1) or 30 (E-1) ports of voice processing are usually sufficient to handle the 48 or 60 ports of T-1 or E-1 interface. The Intel® Dialogic® D/240SC-2T1 and D/300SC-2E1 boards are ideal for drop-and-insert configurations such as those used in call completion and call routing applications.

D/300SC-2E1 Configuration Example

Intel® Dialogic® D/480SC-2T1 Board Configuration Example

Dual Span boards let you expand a system with minimal impact on existing applications. An Intel® Dialogic® D/600SC-2E1 board, for example, can replace two D/300SC-E1 single-span boards without requiring changes to the application software.

ISDN PRI Support

ISDN PRI access firmware is a standard feature enhancement of the Dual Span series. Intel PRI firmware is approved for use with many popular protocols in major markets, based on both T-1 (1.544 Mb/s) and E-1 (2.048 Mb/s) physical interfaces.

Features and benefits of ISDN PRI include:

• ISDN Primary Rate connectivity to CT systems
• Dialed Number Identification Service (DNIS) enables application to automatically identify the purpose of the incoming call
• Automatic Number Identification (ANI) enables application to identify the calling party
• ANI-on-Demand feature saves money by requesting ANI information only when needed
• ISDN offers inherent benefits to call center applications with its fast call setup and fast retrieval of DNIS and ANI information on inbound calls
• Call-by-Call Service Selection - Lets an application select the most efficient bearer channel service on a call-by-call basis
• Subaddressing allows direct connection to individual extensions or devices sharing the same phone number; or, it can be used as a proprietary messaging mechanism
• Powerful and universal software application programming interface (API) simplifies access for developers who are unfamiliar with ISDN, yet enables sophisticated control of features
• Multinational approvals with many popular protocols
• User-to-User Information lets an application send proprietary messages to remote systems during call establishment
• Facility, Notify, and optional information elements let applications work with network-specific supplementary services

Software Support

DIALOG/HD Dual Span boards are supported by System Software and Software Development Kits for MS-DOS*, Windows NT*, and UNIX* operating system environments. These packages contain a set of tools for developing complex multichannel applications.

For added flexibility, the Dual Span ISA-based boards are also supported in CT Media™ telephony server software. This resource management software makes application development easier, and enables applications from different suppliers written to standard APIs like ECTF S.100 to work together on a converged communications server. CT Media server software makes this possible by managing technology resources (boards and host-based technologies) within the server, and providing basic switching functions to multiple client applications.

CT Media server software runs on Windows* 2000. A minimum of 35 MB should be used in any field-deployable system with 64 MB or more recommended. A Pentium processor is recommended, as is a fast (i.e., SCSI II) disk I/O system.

The Dual Span Series supports Board Watch, the SNMP-compatible software for remote CT board management. Board Watch simplifies the management and lowers the total cost of operation of CT devices. These centralized management capabilities provide a single point of configuration and inventory for all network devices. Fault management for high-availability systems includes diagnostics, detection, and recovery capabilities.

Functional Description

For detailed descriptions and block diagrams, see the D/300SC-E1 or D/240SC-T1 data sheet for analogous Intel® Dialogic® Single Span E-1 and T-1 board functionality.

Technical Specifications

All specifications are subject to change without notice.

Notes

See either the D/300SC-E1 or D/240SC-T1 data sheet for the Spring Ware voice processing specifications that apply to the E-1 or T-1 Dual Span boards respectively. For network interface specifications, see the DTI/SC data sheet.

Dual Span boards do not support PEB.

Hardware System Requirements

• Intel386, Intel486, or Pentium IBM PC AT (ISA) bus or compatible computer
• Operating system hardware requirements vary according to the number of channels being used
• Recommend cooling fan specifications of 6 CFM minimum per slot for D/600SC-2E1 and D/480SC-2T1 models

Additional Components

• Multidrop SCbus cables available

*All company names, products, and services mentioned are the trademarks or registered trademarks of their respective owners