D/41EPCI 4-Port PCI Voice Processing with H.100 Interoperability

Features and Benefits

• Four independent voice processing ports in a single PCI slot for low- to medium-density enterprise computer telephony applications 
• With approvals in North and South America and Japan, the D/41EPCI cost effectively expands the application's ability to serve several global markets 
• SCSA™ SCbus™ connectivity enables applications to access additional resources to expand its functionality to include fax, text-to-speech (TTS), and automatic speech recognition (ASR) 
• H.100 connector allows developers to take advantage of the new industry standard CT Bus™ and increases the board's capacity to interoperate with other CT Bus compatible boards 
• Plug and Play ready. Simplifies hardware installation by eliminating DIP switches and jumper settings and enabling software controlled configuration 
• Configure multiple boards in a single chassis, PCI bus or mixed PCI/ISA bus, for easy and cost-effective system expansion up to 64 analog ports 
• Dialogic SpringWare™, downloadable signal and call processing firmware, provides field proven performance based on over three million installed ports with access to future feature enhancements 
• PerfectDigit™ DTMF (touchtone) provides reliable detection during voice playback — allows callers to "type-ahead" through menus 
• A-law or µ-law voice coding at dynamically selectable data rates, 24 Kb/s to 64 Kb/s, selectable on a channel-by-channel basis for optimal tradeoff between disk storage and voice quality 
• International Caller ID capability via on-hook audio path. Supports Bellcore CLASS™, UK CLI, and other international protocols 
• Patented outbound call progress analysis monitors outgoing call status quickly and accurately 
• C-language application program interface (API) for Windows NT^® shortens your development cycle so you can get your applications to market faster 
• Supports SpeechWorks™ Host, a host-based ASR engine 
• Supports PBXpert32™, a free software utility that simplifies switch integration 
• Optional onboard Global Dial Pulse Detection™ (DPD™) feature enables callers with non-touchtone phones to access applications without additional "pulse-to-tone converter" equipment

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

 D/41EPCI supports SpeechWorks Host which enables you to create applications that allow hands-free speed dialing from cellular car phones, hands-free voice mail, and automatic dialing of spoken numbers or names. Complicated numeric menu systems can be reduced to a small set of user-friendly spoken commands.

 Downloaded SpringWare™ firmware algorithms, executed by the onboard DSP, provide variable voice coding at 24 and 32 Kb/s ADPCM, and 48 and 64 Kb/s m-law or A-law PCM, as well as m-law to A-law conversion. 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. SpringWare firmware also provides reliable DTMF detection, DTMF cut-through, and talk off/play off suppression over a wide variety of telephone line conditions.

 Dialogic Global DPD™ dial pulse detection algorithm, available as a software option for the D/41EPCI, lets you use the product in countries that have limited touchtone telephone service. Global DPD can be optimized on a country-by-country basis to provide superior dial pulse detection wherever it is used.

 Dialogic 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 CT system. With industry-standard PCI bus expansion boards you can integrate Dialogic voice products easily into exactly the type of system you require at a price and performance level unmatched in the CT industry.

 The D/41EPCI board

• connects directly to analog loop start telephone lines 
• offers application controlled call answering 
• detects touch tones 
• plays voice messages to a caller and digitizes, compresses, and records voice signals 
• places outbound calls and automatically monitors their progress, all in real time, on four independent channels

 Use the D/41EPCI board to build sophisticated CT systems to which capabilities such as speech recognition, facsimile, and text-to-speech can be added. The D/41EPCI shares a common hardware and firmware architecture with other Dialogic SCbus™ based boards for maximum flexibility and scalability. Features can be added and 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.
 
 

The D/41EPCI installs in any PCI-based personal computer or server (PCI bus or mixed PCI/ISA) and compatible computers (Intel 80386, 80486, or Pentium™-based PC platforms). The D/41EPCI provides everything required for building integrated voice solutions scalable from 4 ports to 64 ports. 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.

 Applications developed to run on the Proline/2V™, DIALOG/4™, D/41D™, D/41H™, or D/41ESC™ family will run on a similar D/41EPCI configuration. Developers can choose from a wide selection of Dialogic products to build scalable, reliable, and economical CT solutions.
 
 

The D/41EPCI board can operate within a mixed chassis containing Dialogic PCI and ISA products. The forward-looking design of the D/41EPCI incorporates the new H.100 connector to simplify connection to next generation CT Bus™ products. The D/41EPCI can also connect to existing SCbus products through the use of an optional CT Bus/SCbus adapter. The adapter provides both SCbus and H.100 physical connectors required to link the D/41EPCI to current SCbus products.

 Software Support

 The D/41EPCI is currently supported by the Dialogic System Software and Software Development Kit for Windows NT^® (Native). This package contains a set of tools for developing complex multichannel applications.

 Functional Description

 The D/41EPCI uses a unique dual-processor architecture that combines the signal processing capabilities of a DSP with the decision-making and data movement functionality of a general purpose 80186 control microprocessor. This dual processor approach off-loads many low-level decision-making tasks from the host computer and thus enables easier 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 analog loop-start telephone line interfaces on the D/41EPCI receives analog voice and telephony signaling information from the telephone network (see block diagram). Each telephone 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 also incorporates circuitry that protects against high-voltage spikes and adverse network conditions and allows applications to go off-hook any time during ring cadence without damaging the board.
 
 

Inbound telephony signaling (ring detection, loop-current detection, and Caller ID information) is conditioned by the line interface and routed via a control bus to the control processor. The control processor responds to these signals, informs the application of telephony signaling status, and instructs the line interface to transmit outbound signaling (on-hook/off-hook) to the telephone network.

 The audio voice signal from the network is bandpass filtered and conditioned by the line interface and then applied to a CODEC (COder/DECoder) circuit. The CODEC filters, samples, and digitizes the inbound analog audio signal and passes this signal to a Motorola DSP.

 Based on SpringWare firmware loaded in DSP SRAM, the DSP performs the following signal analysis and operations on this incoming data:

• automatic gain control to compensate for variations in the level of the incoming audio signal 
• applies an ADPCM (Adaptive Differential Pulse Code Modulation) or PCM (Pulse Code Modulation) algorithm to compress the digitized voice and save disk storage space 
• detects the presence of tones — DTMF, MF, or an application-defined single or dual tone 
• silence detection to determine whether the line is quiet and the caller is not responding

• expands stored, compressed audio data for playback 
• adjusts the volume and rate of speed of playback upon application or user request 
• generates tones — DTMF, MF, or any application-defined general-purpose tone

• transmits an off-hook signal to the telephone network 
• dials out (makes an outbound call) 
• monitors and reports results: line busy or congested; operator intercept; ring, no answer; or if the call is answered, whether answered by a person, an answering machine, a fax machine, or a modem

 When recording speech, the DSP can use different digitizing rates from 24 to 64 Kb/s as selected by the application for the best speech quality and most efficient storage. The digitizing rate is selected on a channel-by-channel basis and can be changed each time a record or play function is initiated. The DSP processed speech is transmitted via the control processor to the host PC for disk storage. When replaying a stored file, the processor retrieves the voice information from the host PC and passes it to the DSP, which converts the file into digitized voice. The DSP sends digitized voice and appropriate signaling responses to the CODEC to be converted into analog format for transmission to the telephone network.

 Signaling data (on-/off-hook, ringing, Caller ID, etc.) is passed to the onboard control processor and transmitted to the application via a dual-port shared RAM and the host PCI bus.

 When using the D/41EPCI board and the SCbus, digital voice and signaling information from a network board or other resource enter the board via the H.100 connector and SCbus interface. A SC2000 chip manages these signals and acts as the traffic coordinator and matrix switch to buffer the high-speed digital data from the bus until the data for each channel can be transmitted to the DSP.

 The SC2000 chip transmits several lower speed data streams over the SCbus high speed channel. The bus configuration is set when the firmware is downloaded at system initialization. This chip incorporates matrix switching capabilities. Under control of the onboard control processor, the SC2000 chip can connect any call being processed to any of the four analog lines or to any of the 1024 SCbus time slots. This enables the application to switch calls to or from other resources, such as facsimile or speech recognition, as they are needed, or to reroute calls.

 The onboard control processors control all operations of the D/41EPCI board via a local bus and interpret and execute commands from the host PC. These processors handle real-time events, manage data flow to the host PC to provide faster system response time, reduce PC host processing demands, process DTMF and telephony signaling before passing them to the application, and free the DSP to perform signal processing.

 Communications between a processor and the host PC is via the Shared RAM that acts as an input/output buffer and thus increases the efficiency of disk file transfers. This RAM interfaces to the host PC via the PCI bus. All operations are interrupt-driven to meet the demands of real-time systems. When the system is initialized, SpringWare firmware is downloaded from the host PC to the onboard code/data RAM and DSP RAM to control all board operations. This downloadable firmware gives the board all of its intelligence and enables easy feature enhancement and upgrades.

 With the rotary switch on the D/41EPCI set to 0, the D/41EPCI board is Plug and Play enabled. Configuration is handled exclusively by software. Alternatively, you can set the rotary switch to another value to manually control board location for ease of cabling or backwards compatibility with Dialogic Board Locator Technology™ (BLT) installation.

 Technical Specifications*
 
 

Number of ports	4
Maximum boards/system	16
Analog network interface	Onboard loop start interface circuits
Resource sharing bus	SCbus OR CT Bus
Control microprocessor	Intel 80C186 @ 16 MHz
Digital signal processor	Motorola DSP56002 @ 49 MHz, with 32 K word private, 0 wait state SRAM
HOST INTERFACE:
Bus compatibility	PCI. Complies with PCISIG Bus Specification, Rev. 2.1
Bus speed	33 MHz max
Bus mode	32 bit to 16 bit conversion in target mode
Shared memory	64 Kbyte page
I/O ports	None
TELEPHONE INTERFACE‡:
Trunk type	Loop start
Loop current range	20 to 120 mA
Impedance	600 Ohms nominal
Ring detection	15 Vrms min, 13 to 68 Hz (configurable by parameter)
Echo return loss	Configurable by software parameter
Cross talk coupling	Less than -70 dB at 1 KHz channel to channel
Receive signal/noise ratio	70 dB referenced to -15 dBm
Frequency response	200 Hz to 3400 Hz ±3 dB (transmit and receive)
Connector	Four RJ-11 type
POWER REQUIREMENTS:
+5 VDC	1.22 A, max.
+12 VDC	140 mA max.
–12 VDC	110 mA max.
Operating temperature	0° C to +50° C
Storage temperature	–20° C to +70° C
Humidity	8% to 80% non-condensing
Form factor	PCI long card, 12.3 in. long.(without edge retainer) or 13.3 in. long (with edge retainer), 0.79 in. wide (total envelope), 3.87 in. high (excluding edge connector)
SAFETY & EMI CERTIFICATIONS:
United States	FCC Part 15 class A; FCC Part 68 EBZUSA-75385-VM-T
	UL: E96804        UL1950
Canada	DOC: 885-5542A
	For specific country approval designation, see the Dialogic Global Approvals list or contact a Sales Engineer
Warranty	3 years standard