Datasheet
Intel
®
Dialogic
®
DIALOG/4
Voice Board
Retired product – This datasheet is for informational purposes only; the product detailed in this
datasheet is no longer available. Consider migrating to the Intel Dialogic D/4PCIUF combined
media board at
http://www.intel.com/network/csp/products/8497web.htm.
The Intel
®
Dialogic
®
DIALOG/4 is a four-port voice
board in a half-size ISA form factor that is ideal for the
small/medium business (SMB) market segment. The
DIALOG/4 has downloadable signal and call process-
ing firmware that facilitates feature enhancement and
helps developers build systems that scale from four to
64 ports.
Features and Benefits
Four independent voice processing ports in a single, half-size ISA slot supporting low- to medium-
density voice systems
Downloadable signal and call processing firmware, Spring Ware, facilitates feature enhancement and
provides field-proven performance based on over four million installed ports
C language application program interfaces (APIs) for MS-DOS*, Windows* 95, Windows NT*, OS/2*,
UNIX*, and Linux* shorten the development cycle to get 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 four to 64 ports
Voice coding at dynamically selectable data rates, 24 Kb/s to 64 Kb/s, selectable on a channel-by-chan-
nel basis for optimal tradeoff in disk storage and voice quality
Enhanced telephone circuitry and automatic gain control (AGC) maintains recording quality over a wide
dynamic range
Perfect digit DTMF (touchtone) provides reliable detection during voice playback - lets callers “type-
ahead” through menus
Outbound call progress analyzes outgoing call status quickly and accurately
Supports PBXpert and PBXpert/32, complimentary utilities that simplify switch integration
Lifetime warranty
Datasheet
Intel
®
Dialogic
®
DIALOG/4 Voice Board
4
Telephone
Network
(analog loop
start lines)
4
4
4
DIALOG/4
DIALOG/4
DIALOG/4
DIALOG/4
PC
Configurations
The Intel
®
Dialogic
®
DIALOG/4 board shares a common
hardware and firmware architecture with other Intel 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 hard-
ware and application code. Applications can be ported to
lower or higher line-density platforms with minimal modifi-
cations.
The DIALOG/4 board installs in IBM* PC XT*/AT* (ISA
bus) and compatible computers (PC platforms based on
the Intel386™, Intel486™, or Pentium
®
processors). The
DIALOG/4 board provides everything required for building
integrated voice solutions scalable from four to 64 ports.
Software Support
The Intel
®
Dialogic
®
DIALOG/4 board is supported by
System Software and SDKs for MS-DOS*, Windows NT*,
Windows* 95, and Linux*. These packages contain a set
of tools for developing complex multichannel applications.
Applications
■
■
■
■
■
■
■
■
Voice mail/voice messaging
Interactive voice response
Audiotex
Inbound and outbound telemarketing
Operator services
Dictation
Auto dialers
Notification systems
2
Intel
®
Dialogic
®
DIALOG/4 Voice Board
Datasheet
Control Bus
Code/Data
DRAM
1 of 4 Shown
80C188
Control
Processor
DSP
CODEC
Line
Interface
To
Central
Office
or PBX
Shared RAM
DSPRAM
IRQ
DATA
PC XT/AT BUS
Functional Description
The Intel
®
Dialogic
®
DIALOG/4 board uses a unique dual-
processor architecture that combines the signal processing
capabilities of a digital signal processor (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 develop-
ment 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
■
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 net-
work. Each interface incorporates circuitry that protects
against high-voltage spikes and adverse network condi-
tions, letting applications go off-hook any time during ring
cadence without damaging the board.
Inbound telephony signaling (ring and loop current detec-
tion) are conditioned by the line interface and routed via a
control bus to the control processor. The control proces-
sor 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 sent through a
bandpass filter, conditioned by the line interface, and then
applied to a COder/DECoder (CODEC) circuit. The
CODEC filters, samples, and digitizes the inbound analog
audio signal and passes the digitized signal to a
Motorola* DSP.
Based on Spring Ware firmware loaded in DSP RAM, the
DSP performs the following signal analysis and opera-
tions on this incoming data:
■
automatic gain control (AGC) to compensate for varia-
tions in the level of the incoming audio signal
applies an Adaptive Differential Pulse Code Modulation
(ADPCM) or Pulse Code Modulation (PCM) 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-frequency tone
silence detection to determine whether the line is quiet
and the caller is not responding
■
For outbound data, the DSP performs the following oper-
ations:
■
■
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
■
3
Datasheet
Intel
®
Dialogic
®
DIALOG/4 Voice Board
The dual-processor combination also performs the follow-
ing outbound dialing and call progress monitoring:
■
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 facsimile machine,
or a modem
When recording speech, the DSP can use different digi-
tizing rates from 24 Kb/s to 64 Kb/s as selected by the
application for the best speech quality and most efficient
storage. The digitizing rate can be selected on a channel-
by-channel basis and can be changed each time a record
or play function is initiated. Outbound processing is the
reverse of inbound processing. The DSP processed
speech is transmitted by the control microprocessor to
the host PC for disk storage. When replaying a stored file,
the microprocessor receives 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 to
the CODEC to be converted into analog voice and then
to the line interface for transmission to the telephone net-
work.
The on-board microprocessor controls all operations of
the DIALOG/4 board via a local bus and interprets and
executes commands from the host PC. This
microprocessor
■
handles real-time events
■
manages data flow to the host PC to provide faster
system response time
■
reduces PC host-processing demands
■
processes DTMF and telephony signals before passing
them to the application
■
frees the DSP to perform signal processing
Communications between this microprocessor and the
host PC is via the shared RAM that acts as an input/out-
put buffer, increasing the efficiency of disk file transfers.
This RAM interfaces to the host PC via the XT/AT bus. All
operations are interrupt-driven to meet the demands of
real-time systems. All DIALOG/4 boards installed in the
PC share the same interrupt line. When the system is ini-
tialized, Spring Ware firmware to control all board opera-
tions is downloaded from the host PC to the on-board
code/data RAM and DSP RAM. This downloadable
firmware gives the board all of its intelligence and enables
easy feature enhancement and upgrades.
4
Intel
®
Dialogic
®
DIALOG/4 Voice Board
Datasheet
Technical Specifications
Number of ports
Max. boards/system
Analog network interface
Microprocessor
Digital signal processor
Four
16
Onboard loop start interface circuits
80C188
Motorola* DSP56001
Host Interface
Bus compatibility
Bus speed
Shared memory
Base addresses
IBM PC XT/AT (ISA)
4 MHz to 12 MHz, 70 nsec back-to-back bus cycle
8 KB page, switch selectable on 8 KB boundaries
D000h (default)
A000h
C000h
Interrupt level
IRQ 2 to IRQ 7 jumper selectable
One IRQ is shared by all DIALOG/4 boards
Telephone Interface
†
Trunk type
Impedance
Ring detection
Loop current range
Receive signal/noise ratio
Crosstalk coupling
Frequency response
Connector
Loop start (or ground start for answer only)
600 Ohms nominal
25 Vrms minimum
15.3 Hz to 68 Hz, 150 Vrms maximum
20 mA to 120 mA, DC (polarity insensitive)
70 dB, referenced to –15 dBm
–70 dB at 1 kHz channel to channel
300 Hz to 3400 Hz ±3 dB (transmit and receive)
Two RJ-11 type
Power Requirements
+5 VDC
+12 VDC
–12 VDC
Operating temperature
Storage temperature
Humidity
Form factor
.75 A
40 mA
40 mA
0°C to +50°C
–20°C to +70°C
8% to 80% noncondensing
PC XT (ISA)
7 in. long (17.5 cm)
0.652 in. wide (1.63 cm)
4.5 in. high (11.25 cm) (excluding edge connector)
Safety and EMI Certifications
United States
Canada
Estimated MTBF
Warranty
FCC part 68 ID#: EBZUSA-65588-VM-E
UL: E143032
DOC: 885-4452A
ULC: E143032
309,000 hours per Bellcore Method I
Intel
®
Telecom Products Warranty Information at
http://www.intel.com/network/csp/products/3144web.htm
5
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